KZN Sports Med Network · Clinical Reference 2025–2026

Evidence-Based
Clinical Guidelines

Select a section to explore topics, or use the sidebar to navigate directly.

🦴

Injuries

Head · Shoulder · Hip · Knee · Ankle

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🧠

Concussion

SCOAT6 · 21-day rule · GRTP

🫁

Respiratory Illness

ARinf · Myocarditis · Prevention

💪

Adhesive Capsulitis

Hydrodilation · POCUS · Celecoxib

🦴

Hip Labral / FAI

MR arthrogram · PAO vs arthroscopy

🦴

GTPS

GMed tendinopathy · Education-first

🦵

ACL Reconstruction

Graft choice · Prehab · Criteria RTP

🧠

ACL Neuroplasticity

Motor learning · Reinjury prevention

🦵

Hamstring Tear

Munich classification · T-junction

🏃

Copenhagen Adduction

Evidence · Dosing · Groin prevention

🦶

Lateral Ankle Ligament

Ottawa rules · Rehab · Broström

🦶

Heel Pain / Baxter's

Differential · PF vs nerve entrapment

⚡

Sports Physiology

Nutrition · Tendon · Decision-Making

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🍽️

Peri-operative Nutrition

Preload · Protein · Micronutrients

💪

Creatine Supplementation

Evidence · Dosing · Emerging uses

🧒

Youth Athlete Nutrition

Caffeine risk · Contamination · Food-first

🔋

RED-S / Low Energy

Recognition · REDS CAT-2 · Management

💉

Tendon Injectables

CSI · PRP · Collagen comparison

📈

Tendon Healing & Rehab

Continuum model · Phase loading

🏆

Return to Play Framework

Multifactorial · Shared decision-making

💊

WADA / Anti-Doping

Strict liability · TUE · GlobalDRO

⚖️

DSD & Gender Eligibility

World Athletics regs · T suppression

👶

Paediatric

Apophysitis · Fractures

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🦵

Sinding-Larsen-Johansson

Apophysitis · Conservative · Education

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Adolescent Clavicle Fracture

Remodelling · Conservative-first

Concussion

Sport-related concussion: assessment, acute management and graduated return to play

📚 KZN Sports Med Network · Aug 2025 · Concussion in Sport Group 6th International Consensus (BJSM 2023)

Pathophysiology & Diagnostic Framework

Concussion is a traumatic brain injury induced by biomechanical forces — direct or indirect. It results in a neurometabolic cascade: rapid efflux of potassium, influx of calcium, glutamate excitotoxicity, mitochondrial dysfunction, and decreased cerebral blood flow at a time of increased energy demand. This mismatch between supply and demand underpins all clinical features and explains why exertion worsens symptoms.

🚨 Concussion is a clinical diagnosis. No single test, biomarker or imaging modality confirms it. When in doubt, sit out.

Diagnostic Criteria — CIS6 Consensus 2023

Direct or indirect biomechanical force transmitted to the brain

Head, face, neck, or body — rotational and linear acceleration-deceleration are the key injury vectors. Rotational forces are more injurious than translational.

Rapid onset of short-lived neurological impairment that may resolve spontaneously

Spontaneous resolution does not exclude concussion — it is an expected feature. Many athletes self-manage and underreport precisely because symptoms resolve quickly on the day.

Functional disturbance — not structural injury

Standard CT and MRI are expected to be normal. A normal scan does not exclude concussion and must never be used to falsely reassure an athlete that they are "clear".

Loss of consciousness in fewer than 10% of cases

The absence of LOC should never be used to argue against the diagnosis. Most significant concussions involve no LOC whatsoever.

Symptoms may be delayed — onset up to 24–48 hours post-injury

Particularly relevant in high-adrenaline competition environments where athletes may play through symptoms without registering them acutely.

Symptom Domains — SCOAT6 Framework

Physical / Somatic

Headache, pressure in head
Nausea, vomiting
Balance problems, dizziness, vertigo
Visual disturbance (diplopia, blurring, photophobia)
Fatigue, low energy
Sensitivity to light (photophobia)
Sensitivity to noise (phonophobia)
Neck pain
Numbness or tingling

Cognitive / Behavioural / Emotional

"Feeling in a fog" or mentally slowed
Difficulty concentrating
Memory impairment (anterograde and retrograde)
Feeling slowed down
Irritability, emotional lability
Sadness, anxiety, nervousness
Sleep disturbance (more or less than usual)
Difficulty with complex tasks

SCOAT6 — Clinic-Based Comprehensive Assessment

SCOAT6 (Sport Concussion Office Assessment Tool) replaces the former SCAT5 as the gold-standard clinic-based tool. It covers 13 domains including symptom evaluation, cognitive screening (orientation, immediate memory, digit span, concentration, delayed recall), neurological screening, vestibular/ocular motor screen (VOMS), and cervical spine assessment.
SCAT6 is the sideline assessment tool for adults ≥13 years — trained healthcare professionals only; not for self-administration.
Child SCAT6 for ages 5–12 — age-appropriate language and normative data.
Normative data: Echemendia et al. BJSM 2023, Oldham et al. 2018, Howell et al. 2019 — critical for interpreting individual test results against age and sex-matched norms.

🚨 Red Flags — Immediate Emergency Referral: focal neurological deficit; seizure; repeated vomiting; deteriorating level of consciousness; GCS <15; suspected cervical spine injury; escalating headache; bilateral limb weakness or sensory change; suspected skull fracture. Do not attempt SCOAT6 — call emergency services.

Modifying Factors — Prolonged Recovery Risk

Prior concussion history — especially with incomplete recovery between events
Younger age — adolescent brain has prolonged vulnerability; recovery typically longer than adults
Female sex — emerging evidence for longer recovery and higher symptom burden
Pre-existing migraine disorder — strongly predicts prolonged post-concussion symptoms
Pre-existing anxiety, depression, ADHD — symptom overlap complicates assessment; recovery more variable
High initial symptom burden at first assessment (SCAT6 symptom score >20)
Elevated BSS (Brief Symptom Scale) or PHQ-9 at presentation

Neuroimaging — When, What and Why

⚠️ Standard neuroimaging (CT, MRI) is normal in the vast majority of concussions and is NOT required for diagnosis. A normal scan does not exclude the injury and must not be used to clear an athlete. Reserve imaging for suspected structural pathology.

CT Head — Indications

Indicated

Canadian CT Head Rule / NICE Head Injury Guidelines

Absolute indications: GCS <15 at 2 hours post-injury; suspected open or depressed skull fracture; signs of basal skull fracture (haemotympanum, Battle's sign, raccoon eyes, CSF rhinorrhoea/otorrhoea); ≥2 episodes of vomiting; age ≥65. Relative: dangerous mechanism (pedestrian vs vehicle, fall >1m, ejection from vehicle); amnesia >30 minutes before impact; post-traumatic seizure; focal neurological deficit.

Important caveat

Normal CT does not mean the athlete is clear

CT is highly sensitive for haemorrhage and structural injury but blind to the neurometabolic dysfunction of concussion. A completely normal CT scan in a symptomatic athlete does not change the concussion diagnosis or management. This must be communicated clearly to athletes and families.

MRI

MRI Brain — Specialist Indications

Prolonged recovery

Persistent symptoms beyond 4 weeks

Standard MRI sequences are expected to be normal. Advanced sequences with clinical utility: SWI (susceptibility-weighted imaging) for microhaemorrhage detection; DTI (diffusion tensor imaging) for white matter tract disruption — both are research tools not yet in routine clinical practice. Clinical MRI at 4–6 weeks is justified to exclude structural cause in persistent cases.

Cervical spine

MRI C-spine — neurological symptoms or high mechanism

Cervical spine injury must be excluded before concussion rehabilitation proceeds. In any athlete with upper limb neurological symptoms, neck pain with radiation, or high-energy mechanism, MRI C-spine is indicated. Do not commence graduated exertion protocol until cervical pathology is excluded.

Emerging

Vestibular assessment / functional MRI

Vestibular-ocular assessment (VOMS) within SCOAT6 is the clinical tool. fMRI demonstrating altered activation patterns in post-concussion athletes is a research finding — not yet clinical practice. Blood biomarkers (GFAP, UCH-L1, S100B) are emerging as adjuncts but not yet in routine use.

💡 The Neurometabolic WindowThe neurometabolic cascade following concussion resolves over days to weeks — but the timeline is invisible on standard imaging. Symptom resolution precedes full neurometabolic recovery. This is why symptom-free status alone is insufficient for return to contact sport. The brain remains vulnerable even when the athlete feels "100%".

Acute & Subacute Management

🚫 Same-day return to play is absolutely prohibited following concussion. Remove from activity immediately.

Immediate Actions (First 24 Hours)

Remove from activity — do not leave athlete alone
Screen immediately for red flags — refer to emergency services if present
No driving for minimum 24 hours; no alcohol; avoid sedating medications
Simple analgesia: paracetamol is preferred for headache. Avoid NSAIDs in first 24 hours (theoretical concern re: microhaemorrhage). Avoid opioids — mask evolving neurological deterioration.
Cognitive and physical rest — brief (24–48 hours). Not prolonged isolation.
Written information sheet to athlete and, where relevant, parent/guardian and school
Safety net: clear instructions on when to return to emergency services (escalating headache, vomiting, altered consciousness, seizure)

Subacute Management (Days 2–14) — Evidence-Based Approach

Avoid prolonged rest beyond 48 hours — evidence consistently shows harm

Cochrane review and multiple RCTs demonstrate that strict rest beyond 48 hours delays recovery compared to graduated re-engagement. The old "dark room rest" approach is contraindicated.

Light aerobic exercise when asymptomatic at rest

Walking, stationary cycling at low intensity — begin within 24–48 hours if tolerated. The Buffalo Concussion Bike Test establishes symptom-limited heart rate threshold for individualised exercise prescription.

Return to Learn (RTL) before Return to Play (RTP)

Academic re-engagement with appropriate adjustments (shortened sessions, reduced screen time, quiet environment, no high-stakes assessment until asymptomatic). Schools require formal communication from treating clinician. RTL protocol is a discrete process — not assumed.

Sleep hygiene — critical and often neglected

Regular sleep-wake schedule; avoid screens for 60 minutes before bed; blackout curtains if photosensitive; target 8–10 hours in adolescents. Sleep is the most potent natural recovery intervention available.

🦵 Post-Concussion Lower Limb Injury Risk: Prospective cohort data demonstrates significantly elevated risk of lower limb musculoskeletal injury (including ACL, ankle) for up to 12 months following concussion. Proprioception, neuromuscular control, and dual-task capacity are impaired beyond symptom resolution. This must inform training programme design and load management even after full RTP clearance.

Persistent Post-Concussion Symptoms (PPCS) — Beyond 4 Weeks

Definition: symptom duration >4 weeks in adults, >4 weeks in adolescents (some guidelines use >4 weeks for all)
Prevalence: 10–30% of concussions; higher in adolescents, females, those with prior concussion or migraine history
Headache: Migraine-like PPCS → preventive therapy (amitriptyline, propranolol, topiramate); cervicogenic component → manual physiotherapy, dry needling
Vestibular symptoms: Vestibular rehabilitation by qualified physiotherapist — highly effective, evidence-based. Central vs peripheral vestibular dysfunction must be distinguished clinically.
Mood/sleep disorders: CBT for insomnia (CBT-i) preferred over pharmacotherapy; SSRI if significant depressive episode
Cognitive symptoms: Neuropsychological assessment; cognitive rehabilitation strategies; school/work accommodation plan
Autonomic dysfunction: Buffalo Concussion Bike Test to establish exercise threshold; subsymptom threshold aerobic exercise programme accelerates recovery
Multidisciplinary team: sports physician, neuropsychologist, vestibular physiotherapist, neurologist, psychologist — coordinate care

Pharmacological Considerations

No evidence for routine pharmacotherapy in acute concussion management
Melatonin: reasonable for sleep disruption — low risk, modest evidence
Magnesium: some evidence for reducing headache frequency in PPCS with migraine phenotype
Amitriptyline 10–25mg nocte: first-line for PPCS with headache + sleep disruption phenotype
Avoid: codeine-containing analgesics (medication overuse headache risk); benzodiazepines; anything that impairs vestibular compensation
Creatine supplementation: emerging neuroprotective evidence — rational adjunct, particularly in athletes with high concussion exposure

Graduated Return to Play (GRTP) — KZN Sports Med Protocol

🚨 21-Day Minimum Rule: No athlete may return to full contact sport within 21 days of concussion diagnosis — unless they are a professional contracted rugby player operating under SANZAR/World Rugby regulations with mandatory medical officer oversight. This applies regardless of symptom resolution.

⚠️ Why 21 days? Neurometabolic recovery lags well behind symptom resolution. fMRI, blood biomarker, and neurophysiological studies consistently demonstrate ongoing cerebral dysfunction in athletes who are clinically "symptom-free" at 10–14 days. The 21-day minimum in non-professional athletes reflects the evidence that the brain remains in a vulnerable state even when the athlete feels well. Early return to contact increases the risk of second-impact syndrome — a rare but potentially fatal condition in young athletes.

Minimum RTP

21 days

Non-professional athletes — regardless of symptom resolution

Stage Minimum

24 hours

Per GRTP stage if asymptomatic throughout

RTL First

Always

Return to Learn must precede Return to Play

Lower Limb Risk

12 months

Elevated MSK injury risk — maintain neuromuscular programme

GRTP — Six-Stage Protocol

Symptom-Limited Activity

Day 0 onwards

▼

Daily activities that do not provoke symptoms — walking, light household activity
No physical exertion; no screens beyond brief tolerance; cognitive rest
Goal: symptom stabilisation and brief period of reduced load
Do not progress to Stage 2 until asymptomatic at rest

Light Aerobic Exercise

Minimum 24hrs at each stage

▼

Walking, swimming, stationary cycling at low intensity (HR <70% maximum)
No resistance training at this stage
Goal: increase heart rate without symptom provocation
If symptoms return: drop back one stage and wait 24 hours before reattempting

Sport-Specific Exercise

Minimum 24hrs

▼

Running drills, skating, swimming with moderate intensity
No heading, no contact, no collision risk activities
Sport-specific movement patterns without opposition or physical contact

Non-Contact Training Drills

Minimum 24hrs — medical review before Stage 5

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More complex drills involving other players — no physical contact
Resistance training may resume
Coordination, dual-task demands, reactive agility drills
Medical clearance required before proceeding to Stage 5 — formal clinical assessment confirming symptom-free status, normal neurological exam, and satisfactory cognitive recovery

Full-Contact Practice

Not before Day 21 (non-professional)

▼

🚨 21-Day Gate: For non-professional athletes, Stage 5 (full contact) may not commence before Day 21 from the date of concussion diagnosis — regardless of how quickly the earlier stages were completed.

Full contact training with team — all drills including collision
Normal participation including heading (football), tackling (rugby), body contact (hockey, basketball)
Medical clearance formally documented

Return to Competition

After successful full-contact practice

▼

Full return to match/competition play
Educate athlete: each subsequent concussion may have a longer recovery and lower threshold for injury — this is not psychological, it is neurophysiological
Maintain neuromuscular training programme for 12 months given persistent lower limb injury risk
Document RTP clearly in medical records with date and stage completion

Multiple Concussion Management

Three concussions in a season — formal neuropsychological assessment before RTP

Two concussions with incomplete recovery between — specialist review mandatory

Escalating symptom severity or duration with each event — consider retirement from contact sport

Cumulative exposure discussion — long-term CTE risk (unresolved, emerging evidence)

Explain to athlete and family: current evidence does not establish CTE risk from single concussions, but cumulative subconcussive exposure over years of contact sport is an area of active research. Informed discussion — not alarmism.

Second Impact Syndrome — Why the 21-Day Rule Matters

Second Impact Syndrome (SIS) is a catastrophic, often fatal condition in which a second concussion is sustained before the first has fully resolved. The autoregulatory mechanisms of the brain are overwhelmed, resulting in malignant cerebral oedema. SIS is almost exclusively reported in athletes under 25 years of age — making the 21-day rule most critical in the youth and amateur athlete population.

Respiratory Illness in Athletes

ARinf classification, in-competition decision-making and prevention in the competitive athlete

📚 KZN Sports Med Network · May 2025 · IOC Consensus Statement on Acute Respiratory Illness

Classification of Acute Respiratory Infection (ARinf)

The IOC consensus classifies ARinf by anatomical location and severity rather than purely by pathogen. This anatomical-severity framework guides clinical decision-making better than empirical aetiology-based classification, as pathogen identification is rarely available at point of care.

Neck Check Rule — Bedside Heuristic

A useful clinical anchor for rapid decision-making: symptoms confined above the neck (nasal congestion, sore throat, sneezing, mild cervical lymphadenopathy) in an afebrile athlete with normal resting heart rate may permit modified training. Symptoms below the neck or systemic features mandate rest.

Above neck only — modified exercise may be appropriate

No fever, no myalgia, no chest involvement, no systemic symptoms. Monitor closely — abort exercise if symptoms worsen or new features emerge.

Below neck / systemic features — rest is mandatory

Fever (>37.5°C), myalgia, chest tightness or cough, dyspnoea, significant fatigue, tachycardia at rest — exercise is contraindicated. Any fever is an absolute contraindication to training or competition.

Severity Classification — IOC Framework

Severity	Clinical Features	Management Approach
Mild	URTI only, afebrile, no systemic symptoms, no chest involvement, training performance unaffected	Continue training with symptom monitoring and intensity reduction; monitor temperature daily
Moderate	Low-grade fever, moderate fatigue, myalgia — performing activities of daily living	Rest until afebrile ≥24hrs; graded return to training over 5–7 days
Severe	High fever, systemic illness, chest involvement, unable to perform ADLs, hospitalisation	Absolute rest; formal medical assessment; exclude myocarditis before any exercise

Differential Considerations in Athletes

Overtraining Syndrome (OTS): Chronic underperformance + recurrent illness may indicate RED-S or OTS rather than primary infection. Address underlying energy availability and training load.
Exercise-Induced Bronchoconstriction (EIB): Post-exercise cough/wheeze in "respiratory illness" — consider spirometry and bronchodilator reversibility. Prevalence in elite athletes 30–70% in cold or chlorinated environments.
Vocal Cord Dysfunction (VCD): Inspiratory stridor mimicking asthma or respiratory illness — laryngoscopy diagnostic. Often stress-related in adolescent athletes.
Infective Mononucleosis (EBV): Prolonged fatigue, lymphadenopathy, pharyngitis — monospot and EBV serology. Splenomegaly risk mandates contact sport restriction. Ultrasound to monitor spleen size.

🚨 Any athlete with chest pain, palpitations, significant dyspnoea, syncope, or marked tachycardia beyond what the fever alone would explain: exclude myocarditis before any return to exercise.

Investigations in the Athlete with Respiratory Illness

Labs

Laboratory Investigations — Stratified by Severity

Routine

FBC with differential, CRP, ESR

Neutrophilia suggests bacterial infection; lymphocytosis suggests viral. CRP >100 mg/L in the context of pharyngitis + lymphadenopathy: consider bacterial tonsillitis. CRP in the 20–50 range is nonspecific — use clinical context. ESR less useful acutely.

Cardiac screen

Troponin I/T + 12-lead ECG

Mandatory in: any chest pain, palpitations, dyspnoea disproportionate to fever severity, resting tachycardia >20bpm above expected for temperature, and any moderate-severe illness. Troponin elevation + ECG changes (ST changes, new LBBB, PR prolongation, VT) = halt all exercise, urgent cardiology referral. Do not wait for troponin to normalise before referring.

Microbiology

Viral PCR panel, EBV serology, influenza antigen, COVID-19

Influenza rapid test (sensitivity 60–70% — low negative predictive value). EBV monospot + VCA IgM if lymphadenopathy + pharyngitis + fatigue. COVID-19 lateral flow + PCR confirmation if positive. Strep throat: Strep A rapid test or throat culture. Culture guides antibiotic decision in moderate-severe illness.

CXR

Chest X-Ray

LRTI suspected

Productive cough, fever, hypoxia, symptoms >7 days

PA + lateral views. Consolidation pattern: lobar (bacterial), diffuse bilateral (viral/atypical). Hilar lymphadenopathy: EBV, tuberculosis, sarcoidosis. Pleural effusion: complicated pneumonia, empyema. SpO₂ <94% at rest in a presenting athlete with respiratory symptoms = urgent CXR + emergency review.

CMR

Cardiac Imaging — Suspected Myocarditis

Gold standard

Cardiac MRI with T1/T2 mapping + late gadolinium enhancement (LGE)

Sensitivity ~80%, specificity ~85% for myocarditis. LGE pattern is mid-myocardial or epicardial (contrast with subendocardial LGE in ischaemic disease). T2 signal elevation indicates myocardial oedema (active inflammation). T1 mapping (native T1 elevation) is the most sensitive marker. Echocardiogram as first-line if CMR unavailable — may be normal in early or focal myocarditis.

If CMR unavailable

Echocardiography + Holter monitoring

Echo assesses wall motion abnormalities, systolic function (reduced EF), pericardial effusion. Holter: arrhythmia screen — VT, high-grade AV block, frequent ectopy. 24–48hr Holter minimum. Exercise ECG not appropriate until inflammation has resolved.

Management — Stratified by Severity

Mild URTI — Symptom Management

Saline nasal irrigation — reduces mucosal oedema, accelerates mucociliary clearance
Decongestants (pseudoephedrine, oxymetazoline): check WADA prohibited list before prescribing. Pseudoephedrine threshold: <150 μg/mL urine — dose-dependent, avoid in competition.
Antihistamines: sedating agents contraindicated in-competition. Non-sedating (loratadine, cetirizine) are WADA-compliant and appropriate for rhinorrhoea.
Throat lozenges, warm fluids, honey — symptomatic relief, evidence-supported in URTI context
Analgesics: paracetamol or ibuprofen for fever and pharyngitis pain

Moderate–Severe ARinf — Medical Management

Antibiotics: Only if bacterial infection confirmed or strongly suspected. Group A Strep pharyngitis: amoxicillin 500mg TDS × 10 days. Community-acquired pneumonia: amoxicillin-clavulanate ± macrolide. Avoid broad-spectrum empirical antibiotics without clinical justification — antibiotic stewardship.
Antivirals: Oseltamivir (Tamiflu) 75mg BD × 5 days — indicated within 48hrs of confirmed influenza onset. May reduce duration by 1–2 days and reduce complications. Particularly valuable in high-performance peri-competition context.
NSAIDs: Ibuprofen for fever and myalgia. Avoid in dehydrated athletes — nephrotoxic risk. Avoid in suspected myocarditis — theoretical concern re: prostaglandin-mediated cardiac inflammation.

Prevention — Evidence-Based Strategies

Annual influenza vaccination — recommended for all competitive athletes

Particularly important in the pre-competition taper period (Comrades, Ironman, team sport season). Quadrivalent inactivated vaccine. No live attenuated nasal spray in immunosuppressed athletes.

Open Window Hypothesis — training load management

Intense exercise (>90 minutes, >75% VO₂max) transiently suppresses secretory IgA and NK cell activity for 3–72 hours post-exercise. This "open window" increases susceptibility to URTI. Periodise training to avoid high-load days in the week before major competition. Taper allows immunological recovery.

Vitamin C 200–1000mg/day

Meta-analyses show ~50% reduction in URTI incidence in athletes specifically (not in general population) — effect size is meaningful in this population. Low risk, reasonable recommendation.

Sleep — <7 hours/night associated with 3× increased infection risk

Sleep is the highest-yield immune modulator available. During high training load blocks, sleep duration and quality should be actively monitored alongside training metrics.

Zinc, probiotics, quercetin — modest evidence in athletes

Zinc acetate lozenges within 24hrs of URTI onset may reduce duration. Probiotic supplementation (Lactobacillus species) reduces URTI frequency in several RCTs of athletes. Quercetin: emerging evidence for immune support in heavy training. All are WADA-compliant.

Return to Training & Competition

Mild URTI

2–3 days

Modified training while symptomatic if afebrile; full return when asymptomatic

Moderate ARinf

5–7 days

Afebrile ≥24hrs before graded return

Severe ARinf

10–14 days

Full medical assessment before any return

Myocarditis

3–6 months

Cardiology clearance — CMR normalisation + Holter required

Graduated Return to Training Protocol

Prerequisite: Afebrile for ≥24 hours; no resting tachycardia; symptoms resolving
Day 1: Walking, gentle stretching — 20–30 minutes, HR <60% max. No group contact yet.
Day 2–3: Low-intensity aerobic exercise — HR 60–70% max. Running, cycling, swimming.
Day 4–5: Moderate-intensity sport-specific training — HR 70–80% max. Individual drills.
Day 6: Full training session — if no relapse of symptoms.
Competition: After at least one full training session without symptom recurrence.
If symptoms recur at any stage: drop back two steps and reassess with physician before re-escalating.

Myocarditis — Return to Sport Clearance Requirements

Complete restriction from all exercise until formally cleared by cardiologist
CMR: normalisation of LGE, T1 and T2 mapping (may take 3–6 months)
Ambulatory cardiac monitoring (24–48hr Holter): no high-grade arrhythmia
Biomarkers: troponin normalised; CRP and ESR normalised
Exercise ECG or cardiopulmonary exercise test: no ischaemic changes or exercise-induced arrhythmia
Return to training under supervised programme with cardiac monitoring initially
Document cardiologist clearance letter in medical records before any contact/competition

💡 In-Competition Decision — High-Stakes ContextIn peri-race or peri-match scenarios with mild URTI, a risk-benefit discussion is appropriate with an experienced, well-prepared athlete. Key factors: fever absent, symptoms above neck only, athlete well-hydrated, no unusual tachycardia, informed consent, monitoring during and after. This is a clinical judgement — not a protocol override.

Adhesive Capsulitis (Frozen Shoulder)

Diagnosis, image-guided treatment and management in athletes and active patients

📚 KZN Sports Med Network · Nov 2025

Clinical Diagnosis

Adhesive capsulitis is characterised by progressive, painful restriction of glenohumeral range of motion in all planes — particularly external rotation and abduction.

Clinical Stages

Stage	Duration	Features
Freezing	2–9 months	Gradual pain onset, ROM loss begins — most painful stage
Frozen	4–12 months	Pain plateau, significant stiffness — function limited
Thawing	5–26 months	Gradual spontaneous recovery of ROM — pain resolving

Examination Findings

Restricted external rotation — most sensitive sign

Compare bilaterally; loss of ER is earliest and most consistent finding

Global restriction of passive and active ROM in all planes

ER + abduction + IR restriction = capsular pattern

Night pain — characteristic feature

Assess for associated conditions: DM, thyroid disease, Dupuytren's, prior shoulder surgery or immobilisation

⚠️ Diabetic Frozen Shoulder: More severe, more bilateral, more resistant to treatment — especially with brittle T1DM. Manage in conjunction with endocrinology.

Imaging — KZN Network Consensus

💡 Key Insight from Group Discussion (the group): CHL (coracohumeral ligament) thickening on POCUS is diagnostic. MRI is not required for diagnosis of adhesive capsulitis in a typical clinical presentation.

Point-of-Care Ultrasound (POCUS) — First Line

Diagnostic

Coracohumeral Ligament (CHL) Thickness

CHL >3mm = strongly supports adhesive capsulitis. Assess rotator interval: CHL and SGHL thickening with synovial proliferation. High sensitivity when correlated with clinical findings.

Guide

Image-guided hydrodilation and injection

POCUS guidance for glenohumeral hydrodilation + CSI. Real-time confirmation of capsular distension. Significantly improves accuracy over landmark-guided technique.

Plain X-Ray — Baseline

Routine

AP + axillary glenohumeral views

Typically normal in primary adhesive capsulitis. Exclude osteoarthritis, calcific tendinopathy, structural bony pathology.

MRI

MRI — Not Routinely Indicated

Reserve For

Atypical presentation or failed conservative management

If clinical diagnosis uncertain: MRI shows CHL/SGHL thickening, rotator interval synovitis, capsular thickening. MR arthrogram demonstrates reduced joint volume (<10–15mL). Rule out concurrent rotator cuff tear if shoulder pain with weakness.

Management — Evidence-Based Approach

First-Line: Image-Guided Hydrodilation + CSI

✅ KZN Network recommendation: Hydrodilation (hydrodilatation) combined with corticosteroid injection under POCUS guidance is first-line treatment for adhesive capsulitis — superior to either alone.

Glenohumeral hydrodilation: inject 20–40mL saline + corticosteroid (e.g. methylprednisolone 40mg) + local anaesthetic
Goal: distend and disrupt capsular adhesions
POCUS-guided = significantly better accuracy than landmark technique
May be repeated once at 4–6 weeks if incomplete response
Combine with immediate physiotherapy — mobilisation post-injection while anaesthetic in effect

Pharmacological Adjuncts

Celecoxib (COX-2 inhibitor) — antifibrogenic properties

Evidence emerging for celecoxib as adjunct — reduces fibroblast activity. Discussed in KZN group context. Not standard of care but rational addition. 200mg daily.

Oral corticosteroids — short-term symptom relief

Prednisolone 30mg reducing over 3–6 weeks. Most effective in freezing stage. Caution in diabetics — monitor BSL carefully.

Physiotherapy

Pendulum exercises, passive and active-assisted ROM exercises
Heat pre-exercise, ice post-exercise
Avoid aggressive stretching in the freezing (painful) stage
Progressive mobilisation in frozen and thawing stages
Scapular stabilisation and periscapular strengthening as ROM returns

⚠️ Surgery: Reserved for brittle diabetics and cases refractory to 6+ months of conservative management including hydrodilation. Arthroscopic capsular release or manipulation under anaesthesia (MUA).

Return to Sport / Activity

Pain Resolving

3–6mo

Expected timeline to significant functional improvement

Full Recovery

12–24mo

Natural history — up to 40% have residual restriction

RTP Criteria

Pain-free or minimal pain with sport-specific movements

Adequate ROM for sport demands (sport-specific threshold)

Overhead athletes: near-full ER and abduction required; non-overhead athletes: functional ROM threshold lower

Periscapular strength symmetry

Athlete confidence and functional assessment

💡 Overhead AthletesCricketers, swimmers, volleyball players — more demanding ROM requirements. Set expectations: full competitive return may require 6–12 months. Consider modified role/reduced demand while recovering.

Hip Labral Tear / FAI

Femoroacetabular impingement, labral pathology and surgical considerations

📚 KZN Sports Med Network · Oct 2025

Clinical Diagnosis

Hip labral tears most commonly occur in the context of femoroacetabular impingement (FAI). A high index of suspicion is required — presentation often mimics groin pain, adductor pain or lumbar radiculopathy.

FAI Morphology Types

Type	Morphology	Population
Cam	Asphericity of femoral head-neck junction — bony bump on head/neck	Young males, high-impact athletes (football, hockey)
Pincer	Over-coverage of femoral head by acetabulum	Middle-aged females, dancers, cyclists
Mixed	Both cam and pincer elements — most common in athletes	Most common presentation overall

Clinical Examination

FADIR test — most sensitive for labral tear

Flexion 90° + Adduction + Internal Rotation. Anterior groin pain = positive. Sensitivity ~90% but low specificity — rule-out test.

FABER test (Patrick's test)

Flexion + Abduction + External Rotation. Lateral or groin pain = FAI/labral pathology. Hip SI joint differentiation.

C-sign — characteristic patient self-reporting

Patient cups hand around lateral hip forming "C" when describing pain location. Highly specific for intra-articular pathology.

Assess for hypermobility (Beighton score)

Hypermobile patients have different pathomechanics — may have labral tear without bony FAI morphology. the group.

Assess for dysplasia — LCEA on imaging critical

Lateral centre-edge angle <20° = dysplasia. Dramatically changes surgical approach (PAO, not arthroscopy).

⚠️ Hypermobility with labral tear: ligamentum teres pathology may be primary driver — different surgical technique required if arthroscopy chosen.

Imaging Strategy

🚨 Standard MRI is NOT sufficient for hip labral pathology. MR Arthrogram must be specifically requested. Specify this on every referral.

Plain X-Ray — Always First

First Line

AP Pelvis + Lateral Hip (Dunn view or cross-table)

Identify cam morphology (alpha angle >55° = cam), acetabular overcoverage (crossover sign = pincer), dysplasia (LCEA <20°), OA changes (joint space narrowing). All hip labral workups start with plain XR.

Key Measure

Lateral Centre-Edge Angle (LCEA)

Normal: 25–39°. Borderline: 20–25°. Dysplasia: <20°. Critical: LCEA <20° = dysplasia = PAO (periacetabular osteotomy), not arthroscopy. Hip arthroscopy in dysplastic hip = contraindicated.

MRA

MR Arthrogram — Gold Standard for Labrum

Specifically Request

MR Arthrogram (intra-articular gadolinium)

Contrast distends joint space, outlining labrum. Sensitivity for labral tears ~90% (vs ~30% for standard MRI). Always specify MR ARTHROGRAM — not standard MRI hip.

Assess

Labral morphology, articular cartilage, ligamentum teres

Anterior-superior labrum most commonly torn (12–3 o'clock position). Assess cartilage status (Outerbridge grade) — determines surgical outcome. Ligamentum teres — assess in hypermobile patients.

CT — Bony Morphology Assessment

Pre-op

3D CT reconstruction — pre-surgical planning

Defines cam morphology for osteoplasty planning. Acetabular version (retro vs ante-version). Essential if PAO being considered.

Management Algorithm

Conservative Management — First Line (3–6 months)

Activity modification: avoid provocative positions (deep squat, hip flexion >90° with IR)
Physiotherapy: hip and core strengthening, neuromuscular control, movement pattern correction
Addressing movement dysfunction: pelvic tilt, lumbar lordosis, abductor weakness
NSAIDs: short course for acute pain management
Intra-articular CSI (US-guided): diagnostic and therapeutic — good short-term pain relief, may allow better engagement with physiotherapy
Formal criteria for surgery: failure of 3–6 months structured conservative management

Surgical Decision-Making

Hip arthroscopy — for labral repair ± FAI correction

Labral repair superior to debridement for long-term outcomes. Cam osteoplasty (shaving cam lesion). Appropriate when: LCEA normal, minimal OA, failed 3–6mo conservative care.

Periacetabular Osteotomy (PAO) — for dysplasia

LCEA <20° = PAO is the procedure, not arthroscopy. PAO reorients acetabulum to improve femoral head coverage. Major procedure — specialist pelvic/hip preservation surgeon.

Contraindications to arthroscopy

Advanced OA (Tönnis >2), dysplasia (LCEA <20°), avascular necrosis, prior hip surgery in some cases

Return to Play Timeline

Conservative

3–6mo

If symptoms resolve with non-operative management

Post-Arthroscopy

4–6mo

Contact/high-demand sport RTP

Post-PAO

12–18mo

Full osteotomy healing required

Post-Arthroscopy RTP Milestones

Week 0–2: Partial weight bearing (labral repair), flat-foot WB (cam osteoplasty), CPM
Week 2–6: Progressive WB, aquatic therapy, gentle ROM (avoid end-range flexion >90°)
Week 6–12: Strengthening progression, cycling, elliptical
Month 3–4: Running progression, agility ladder, change of direction
Month 4–6: Sport-specific training, monitored return to team training
Return to competition: criteria-based — strength symmetry, hop tests, pain-free sport-specific movement

Greater Trochanteric Pain Syndrome

GMed tendinopathy, lateral hip pain and evidence-based management

📚 KZN Sports Med Network · Dec 2025 · Hip Preservation Society Guidelines

Nomenclature & Diagnosis

⚠️ "Trochanteric bursitis" is a misnomer. True bursitis is present in fewer than 10% of cases. The correct term is Greater Trochanteric Pain Syndrome (GTPS) — primarily gluteus medius/minimus tendinopathy.

Clinical Features

Lateral hip pain over greater trochanter

May radiate down lateral thigh — do NOT confuse with ITB syndrome or radiculopathy

Worse with: cross-legged sitting, side-lying on affected side, stairs, hills

Point tenderness over greater trochanter

Night pain — particularly when lying on affected side

Clinical Tests

Resisted External De-Rotation Test — most specific for GTPS

Hip at 60° flexion, resisted external rotation while moving toward neutral — pain or weakness = positive. More specific than FABER or Trendelenburg alone.

Single-leg stance ≥30 seconds — pain reproduction

Sustained compressive load on tendon — useful for grading severity

Trendelenburg sign — abductor weakness

Contralateral pelvis drop in single-leg stance. Present in significant GMed involvement.

FABER + lateral palpation

Useful but less specific — high false positive rate

Differential Diagnosis

Hip osteoarthritis — FADIR positive, groin pain, XR changes
Lumbar radiculopathy (L4/L5) — dermatomal pain, neurological signs
IT band syndrome — pain at Gerdy's tubercle, Ober's test positive
Piriformis syndrome — deep buttock pain, sciatic distribution
Referred pain from lumbar facet joint

Imaging in GTPS

Ultrasound — First-Line Investigation

Diagnostic

GMed/GMin tendon assessment

Tendon thickening, hypoechogenicity, calcification, tears. Dynamic assessment of tendon during hip movement. Guide for injection therapy. Bursitis present in <10% — if seen, may be secondary to tendinopathy.

Plain X-Ray

Baseline

AP pelvis

Exclude hip OA, calcification, bony lesion. Usually normal in GTPS. Calcific deposits may be seen at trochanteric insertion.

MRI

MRI — Selected Cases

Surgery Planning

Full-thickness GMed/GMin tear assessment

MRI required if considering surgical repair. T2 hyperintensity at footprint. Full-thickness tear + abductor insufficiency = surgical consideration. Coronal T2 fat-sat most useful sequence.

Diagnostic Doubt

Atypical presentation, refractory to treatment

Stress fracture of neck of femur must be excluded in female distance runners, REDs risk population — MRI is gold standard for bone stress injury.

Evidence-Based Management

First Line: Education & Load Management (Gold Standard)

✅ Education is the cornerstone of GTPS management — superior to passive treatment alone. Patient understanding of compressive vs tensile load is therapeutic.

Eliminate compressive positions — non-negotiable

No crossed legs (adduction = compression of GMed tendon). No side-lying on affected hip. Sleep with pillow between knees. Sit with feet shoulder-width apart.

Avoid provocative loading temporarily

No sustained single-leg stance >30s, no hills/stairs for 4–6 weeks during acute phase

Progressive tendon loading programme

Isometrics → isotonics → heavy slow resistance → sport-specific loading. Follow Cook & Purdam continuum.

Injection Therapy

CSI (Corticosteroid) — short-term pain relief only

Best short-term outcomes (6–12 weeks). No long-term benefit. May allow physiotherapy engagement. Maximum 2–3 injections. US-guided peritendinous preferred — not intratendinous.

PRP — superior medium to long-term outcomes

Platelet-rich plasma shows superior outcomes vs CSI at 3–12 months. Consider if CSI fails or patient prioritises longer-lasting effect. Combine with loading programme.

⚠️ Surgery is reserved for confirmed full-thickness tear with abductor insufficiency on MRI, after failure of ≥6 months structured conservative management.

Return to Activity

Education Phase

Wk 1–4

Compression elimination + isometric loading

Loading Phase

Wk 4–12

HSR programme, pain-monitored

Sport Return

3–6mo

Gradual reintroduction of sport-specific demands

Running Return Criteria

NRS pain ≤3/10 with single-leg activities
Single-leg squat to 60° without pain or Trendelenburg
30-second single-leg stance pain-free
Hip abductor strength ≥90% limb symmetry
Flat-surface running before hills or intervals
Avoid ipsilateral arm swing crossing midline — increases adduction moment

💡 Long-termMaintain abductor strengthening programme indefinitely. GTPS has high recurrence if load management principles are abandoned. Educate on lifelong posture habits (avoid crossed legs permanently).

ACL Reconstruction

Graft selection, prehabilitation, rehabilitation and criteria-based return to sport

📚 KZN Sports Med Network · Aug 2025 · MOON, Aspetar and Liverpool Evidence-Based Protocols

Mechanism, Presentation & Clinical Assessment

Biomechanics of ACL Injury

Non-contact mechanism (70–80%): Deceleration, cutting, pivoting — knee near full extension, valgus collapse, foot planted. The "position of no return": hip internal rotation + adduction + knee valgus + tibial internal rotation loads the ACL maximally.
Contact mechanism (20–30%): Direct valgus force — tackle, dashboard injury. MCL commonly co-injured.
Classic history: audible or felt "pop", immediate haemarthrosis (within 2–4 hours in 70% of ACL tears), inability to continue play, rapid swelling
Haemarthrosis in young active patient = ACL tear until proven otherwise. Aspirate for diagnosis and pain relief if tense. Lipohemarthrosis (fat globules) = intra-articular fracture — urgent imaging.

Clinical Tests — Sensitivity and Specificity

Lachman Test — most sensitive (87–98%) and specific (91–98%)

20–30° flexion; stabilise femur; anterior tibial translation against a fixed femur. Graded: Grade 1 (<5mm firm end-point), Grade 2 (5–10mm soft end-point), Grade 3 (>10mm no end-point). Most reliable in the acute haemarthrotic knee where the anterior drawer is painful and hamstring guarding is present.

Pivot Shift Test — most specific for rotatory instability

Combined valgus + internal rotation with extension from 30° to 0° — subluxation then reduction clunk. Grades 0–3. Best predictor of subjective instability, functional limitation, and patient-reported outcomes. Grade 3 pivot shift = strong indication for surgical reconstruction regardless of other factors. Difficult to perform in acute haemarthrosis.

Anterior Drawer — less reliable acutely

90° flexion, seated on foot. Hamstring guarding reduces sensitivity in acute injury. More useful in chronic ACL insufficiency where muscle guarding is absent.

Associated Injuries — Mandatory Assessment

Medial meniscus (50%): Posterior horn most commonly. McMurray + Thessaly in clinic; MRI confirms. Repair vs resection decision at time of ACL reconstruction critically affects long-term outcomes.
Lateral meniscus (30%): Particularly with acute pivot-shift mechanism. Bucket-handle tear pattern common — may lock the joint.
MCL injury: Most partial tears heal conservatively. Complete MCL tears with ACL: typically sequential (MCL first, then ACL reconstruction after MCL healing)
Posterolateral corner (PLC): Critical not to miss. Combined ACL+PLC = high failure rate if ACL reconstructed without addressing PLC. Arcuate sign on XR (fibular head avulsion) is pathognomonic. Varus stress test at 0° and 30°: + at 30° only = isolated LCL/PLC; + at 0° = complete PLC disruption.
Bone bruise: Characteristic lateral tibial plateau + posterior lateral femoral condyle — confirms pivot-shift mechanism. Resolves in 3–6 months — does not require specific treatment.

Imaging Strategy

Plain X-Ray — Always First

Acute

AP + lateral knee + Rosenberg view

Exclude fracture: tibial spine avulsion (paediatric/adolescent — requires ORIF if significantly displaced; do not miss); Segond fracture (pathognomonic lateral tibial capsule avulsion = ACL tear in >95%); fibular head avulsion (arcuate sign = PLC injury). Rosenberg view (45° flexion weight-bearing PA): most sensitive plain film view for early joint space narrowing.

Key finding

Segond Fracture — diagnose ACL at XR stage

Small avulsion fragment from the lateral tibial plateau (anterolateral ligament avulsion). When present, ACL tear probability >95%. Proceed directly to MRI for complete injury mapping — no need for equivocation.

MRI

MRI Knee — Gold Standard for Full Injury Assessment

ACL assessment

Complete vs partial tear — sagittal plane

Sensitivity 86–100%, specificity 95–100%. Complete discontinuity of fibres on sagittal T2. Partial tear: some intact fibres — may be managed conservatively if low-grade pivot shift and athlete accepts conservative management with neuromuscular rehabilitation. Posterior slope of tibial plateau (>12° on MRI) is a modifiable risk factor for ACL reinjury — consider high tibial osteotomy in high-risk cases.

Menisci

Coronal + sagittal — both menisci

T2 signal within meniscus reaching articular surface = tear. Bucket-handle: "double PCL sign" on sagittal (displaced fragment lies parallel to PCL). Root tear: radial tear at posterior root insertion — dramatically increases contact pressure; must be repaired. Meniscal repair vs partial meniscectomy is one of the most consequential surgical decisions in knee surgery.

PLC

Posterolateral corner — fibular head, popliteus, PFL

PLC injury = altered surgical planning. Combined ACL + PLC: stage repair (PLC first, then ACL) or concurrent — specialist surgeon decision. Missing PLC results in graft failure.

Cartilage

Outerbridge grade

Grade 3–4 chondral lesions significantly affect prognosis and may influence surgical timing and technique. Malalignment (varus/valgus) must be addressed concurrently or sequentially if significant cartilage disease is present.

Surgical & Rehabilitation Management

Surgical Decision-Making — Is Reconstruction Required?

Conservative management is appropriate for: isolated ACL tear in low-demand athletes, older patients with minimal pivot-shift instability who are willing to modify activity, athletes with contraindications to surgery
Reconstruction is recommended for: high-demand athletes in pivoting sports, any athlete with Grade 2–3 pivot shift, combined ligament injuries, recurrent giving way episodes despite rehabilitation, young athletes who wish to return to pivoting sport
Timing: Prehabilitation first — defer surgery until full extension restored, swelling resolved, quadriceps activation present, and pain controlled. "Cool knee, quads firing" principle. Operating on an acutely swollen, hot knee with limited ROM significantly increases risk of arthrofibrosis.

Graft Selection — Evidence-Based Approach

Graft	Pros	Cons	Best For
Quadriceps Tendon	Largest cross-sectional area; no hamstring harvest morbidity; bone plug option available; growing literature supports equivalence or superiority	Anterior knee symptoms possible; quad strength deficit post-op	Now preferred by many knee surgeons, especially for revision ACL
Hamstring (4-strand semitendinosus/gracilis)	Well-studied; lower anterior knee morbidity than BPTB; good outcomes at 10 years	Harvest reduces hamstring strength (significant at IR); graft diameter variable; tendon regrowth inconsistent	Adolescents with open physes (all-epiphyseal technique); lower-demand athletes
Patellar Tendon (BPTB)	Bone-to-bone healing at 6–8 weeks; historically gold standard; large evidence base	Anterior knee pain (30%); kneeling pain (50%); patellar fracture risk; PFPS risk	Revision ACL surgery; athletes with previous hamstring injury
LARS (synthetic augmented)	Potentially faster biological ingrowth with augmentation	Standalone LARS has high long-term failure rate — must not be used as sole graft. Only as augmentation to biological graft in selected cases.	Surgeon-specific; not standard first-line

Prehabilitation — Non-Negotiable

✅ Prehabilitation significantly improves post-operative outcomes. MOON cohort data shows every additional week of prehab (up to 12 weeks) improves 2-year outcomes. Operate on a "calm knee with firing quads".

Full passive extension — must equal contralateral side

Extension deficit is the single most important prehab target. Even 5° loss of extension predicts arthrofibrosis post-op. Aggressive extension stretching, heel props, and extension mobilisation.

Quadriceps activation — SLR, quad sets, terminal knee extension

Swelling control — elevation, cryotherapy, compression

Psychological preparation — ACL-RSI assessment pre-operatively

Baseline ACL-RSI <40% = significantly elevated risk of failure to return to sport. Address pre-operatively with psychological support — does not resolve spontaneously.

Criteria-Based Return to Sport — The New Standard

🚨 Time-based RTP is insufficient and dangerous. Criteria-based, test-battery RTP is the current standard of care. Meeting time criteria alone does not mean the athlete is safe to return.

Quad Strength (LSI)

≥90%

Isokinetic dynamometry at 60°/s and 180°/s preferred

Hamstring Strength (LSI)

≥90%

H:Q ratio ≥0.6 — critical for dynamic valgus control

Hop Test Battery (LSI)

≥90%

Single hop, triple hop, crossover hop, 6m timed hop

ACL-RSI Score

≥80%

Psychological readiness — independent predictor of reinjury

Minimum Biological

9 months

Graft ligamentisation — not negotiable regardless of test results

⚠️ Reinjury Risk Data: Athletes who return before 9 months have 3–7× greater reinjury risk. Each additional month of protected rehabilitation beyond 9 months reduces reinjury risk by approximately 51% per month (Grindem et al. 2016). At 9 months, reinjury risk begins to approximate population baseline around 12–18 months.

Phase-Based Rehabilitation Overview

Phase	Timeline	Key Milestones
Phase 1: Protect	0–6 weeks	Full extension, quadriceps activation, gait normalisation, swelling control. Non-weight-bearing cycling. Avoid open-chain quads 0–60° (protects graft).
Phase 2: Strength	6–12 weeks	Progressive closed chain loading. Stationary cycling, pool running, leg press. Milestone: single-leg squat 60°; SLR without extension lag.
Phase 3: Running	3–6 months	Running programme initiated (typically 3–4 months). Straight-line first; change of direction after strength criteria met. Strength benchmarks: >70% LSI at 6 months.
Phase 4: Sport-Specific	6–9 months	Reactive agility, cutting, team training. Dual-task loading. Psychological readiness work.
Phase 5: RTS	9 months+	All criteria met. Graded return to contact and competition. Maintenance programme ongoing.

Contralateral ACL Risk — Often Overlooked

Post-ACL reconstruction athletes have 2–3× increased risk of contralateral ACL tear — particularly in the first 24 months after RTP. Bilateral neuromuscular training, valgus control work, and prophylactic programmes (FIFA 11+, KNEE programme) should be maintained for at least 24 months post-RTP. The neuroplasticity deficit (altered motor strategies protecting the operated limb) transfers load and risk to the contralateral knee.

ACL Neuroplasticity & Motor Learning

The neurophysiological dimension of ACL injury, rehabilitation and reinjury prevention

📚 KZN Sports Med Network · Feb 2026

ACL as a Neurophysiological Injury

💡 ACL injury is not just structural — it is a neurophysiological injury. The ACL is a richly innervated structure. Its mechanoreceptors do not fully reinnervate after reconstruction, permanently altering somatosensory feedback.

Neurological Consequences of ACL Injury

Mechanoreceptor loss — not recovered post-reconstruction

Ruffini endings, Pacinian corpuscles, Golgi tendon-like organs within the ACL are severed. The graft does not restore these proprioceptive sensors. This is permanent, not temporary.

Cerebellar shutdown

Loss of mechanoreceptor input disrupts cerebellar automatic movement programmes. Athletes lose automaticity — they must think about movements that were previously automatic (cutting, landing).

Cortical reorganisation — maladaptive changes

fMRI studies show altered cortical activation patterns in ACL-reconstructed athletes. The brain's motor representation of the injured limb changes.

Kinesiophobia is neurological, not psychological

Fear of movement is not weakness or anxiety — it reflects genuine disruption of the motor-sensory feedback loop. Understanding this changes how we counsel athletes.

🚨 Current standard RTP criteria (strength + hop tests) do not assess neuroplasticity deficits — yet contralateral ACL reinjury risk is 235% higher than in non-injured athletes, even after meeting conventional criteria.

Assessment of Neurological Recovery

Standard structural imaging does not assess neuroplasticity. Neurological recovery requires functional assessment tools. Research modalities (fMRI, qEEG, eye tracking) are emerging but not yet in routine clinical practice.

Functional Neurological Assessment Tools

Dual-task testing

Cognitive + motor task simultaneously (e.g. counting backwards while single-leg hopping). Neurologically recovered athletes maintain performance; deficient athletes show deterioration in either or both tasks.

Reaction time tests

Drop-jump reaction, unexpected direction change tasks. Assesses subcortical automaticity — not captured by standard hop tests.

ACL-RSI (Return to Sport after Injury)

Psychological readiness — proxy for neurological confidence. Score <80% correlates with kinesiophobia and maladaptive movement patterns.

Force plate landing assessment

Vertical ground reaction forces, asymmetry during drop landing. Identifies ongoing limb avoidance strategies not visible to the eye.

Neuroplasticity-Informed Rehabilitation

These principles should be integrated throughout ACL rehabilitation, not bolted on at the end.

Key Rehabilitation Principles

External focus of attention

Cue the athlete to focus on external outcomes ("push the floor away") rather than internal body mechanics ("bend your knee more"). External focus facilitates cerebellar automaticity.

Differential learning (variability practice)

Vary task parameters constantly rather than repeating identical patterns. Neuroplasticity is driven by variability — not repetition. E.g. jump and land on different surfaces, different heights, different directions.

Dual-task training

Progressively add cognitive challenges to motor tasks. Ball catch while landing. Responding to colour cues while cutting. Rebuilds divided-attention capacity lost post-injury.

FIFA 11+ programme

Works via neuroplasticity framework — not purely through strength. The warm-up programme drives motor learning, proprioception and movement pattern correction. This explains its injury prevention effect mechanistically.

Neuroplasticity & RTP Decision-Making

⚠️ Meeting strength and hop test criteria does not mean neurological recovery is complete. Both must be assessed.

Additional RTP Criteria — Neuroplasticity Framework

Dual-task test performance symmetrical

Cognitive + motor task performance comparable bilaterally

Reactive agility — unpredictable direction change

Not planned agility tests but reactive, stimulus-driven change of direction. Tests cerebellar automaticity.

ACL-RSI ≥80% AND absence of kinesiophobia patterns in training

Minimum 9 months — graft maturation non-negotiable

💡 Clinical PearlThe 235% increase in contralateral ACL risk after RTP is largely explained by altered movement strategies from neuroplasticity deficits — athletes protect the operated leg at the expense of the other. Neuroplasticity-informed rehabilitation addresses both limbs.

Hamstring Tear

Munich classification, T-junction injury, management and multifactorial return to play

📚 KZN Sports Med Network · Jan 2026 · Munich Classification (Müller-Wohlfahrt 2013) · T-Junction Masterclass Mar 2026

Munich Classification of Muscle Injuries

The Munich classification (Müller-Wohlfahrt et al. 2013, British Journal of Sports Medicine) is the most clinically practical and widely adopted classification system for muscle injuries in sport. It distinguishes between functional disorders (no structural damage) and structural muscle injuries.

Munich Classification — Full Schema

Type	Grade	Pathology	Imaging	Approx. RTP
Functional	1a	Fatigue-induced: overexertion, no structural damage	Normal	3–7 days
	1b	DOMS: delayed onset muscle soreness	Normal	3–5 days
Structural	2a	Minor MTJ partial tear — lesion <5cm	T2 signal at MTJ <5cm	14–21 days
	2b	Moderate MTJ partial tear — lesion ≥5cm	T2 signal at MTJ ≥5cm	21–42 days
	2c	Intra-muscular partial tear — within muscle belly	Intramuscular T2 signal	21–35 days
	3a	Subtotal tear — extensive, large haematoma	Large T2 lesion, haematoma	6–12 weeks
	3b	Complete tear — full-thickness with tendon avulsion	Complete disruption	3–6 months (may require surgery)

T-Junction — A Specific High-Risk Entity

⚠️ T-junction injuries require special management and carry a higher reinjury rate than standard MTJ injuries. The T-junction is the proximal musculotendinous junction of the biceps femoris long head — where the central tendon branches into the muscle belly, creating a "T" geometry.

Anatomy: The biceps femoris long head tendon divides at the proximal MTJ into medial and lateral intramuscular tendon sheets — this junction is mechanically vulnerable to shear forces during high-speed sprinting
Biomechanical context: Occurs predominantly during late swing phase of sprinting when the hamstring is decelerating the limb at near-maximum length under eccentric load
Clinical features: Often presents like a moderate Grade 2 tear clinically — but MRI reveals more extensive injury, frequently involving both the muscular and tendinous components
Key implication: Add 2–4 weeks to the expected RTP timeline for the corresponding Munich grade when T-junction involvement is confirmed on MRI
Rehabilitation: Loading must specifically address the proximal MTJ — emphasise eccentric loading through full hip flexion range (Norwegian hamstring curl progression, single-leg Romanian deadlift)

Proximal Hamstring Avulsion — The Serious End

Complete avulsion of the conjoint proximal hamstring tendon from the ischial tuberosity — Grade 3b
Mechanism: forced hip flexion with knee extended (waterskiing fall, horse riding fall, cheerleading)
Examination: palpable gap, severe bruising tracking distally along posterior thigh ("racoon sign"), weakness at all hamstring tests
MRI: tendon retraction distance and muscle quality (fatty infiltration) determine surgical outcome
Surgical repair within 4 weeks: best outcomes. Chronic retraction >3cm: surgical repair more complex, results less predictable
Post-surgical RTP: 6 months minimum for return to high-speed sport

Imaging Strategy — Stage and Grade

Ultrasound — Acute Phase Assessment

Acute (0–48hrs)

Haematoma size, location and characteristics

Immediate clinical utility: identify large haematoma requiring aspiration (>5cm diameter or symptomatic). Dynamic assessment of muscle integrity. Underestimates injury extent vs MRI — particularly for intramuscular tears and proximal tendon involvement. Use as first-line for haematoma decision-making; always follow with MRI for full classification and RTP planning.

Guided intervention

US-guided haematoma aspiration

Aspiration of organised haematoma (>48hrs after injury) significantly reduces recovery time and reinjury risk in Grade 2b/3a injuries. Use a large bore needle (18G) under US guidance. Removes up to 20–40mL of liquefied blood. PRP instillation post-aspiration: emerging practice — not yet standard of care.

MRI

MRI Thigh — Gold Standard for Classification

Optimal timing

24–72hrs post-injury — T2 signal maximal at this window

Axial + coronal T2 fat-saturated sequences are essential. T1 for haematoma characterisation. Key measurements: lesion length (cm), cross-sectional area involvement (%), proximal distance from ischial tuberosity, specific muscle involved (BF long head most common; semimembranosus has worst prognosis), T-junction involvement (axial specifically at the branching level).

Prognostic measures

Lesion length and % cross-section — best RTP predictors

Lesion length >6cm: adds approximately 10–14 days to expected RTP. Cross-section involvement >50%: extended recovery. Proximal tendon involvement (intramyotendinous): worst prognosis within each grade. Fatty infiltration on T1 in chronic injury: predicts failure of conservative management.

T-junction specific

Axial T2 at branching level of biceps femoris long head

Specifically request axial cuts at the proximal MTJ level. T-junction involvement changes the RTP timeline and loading prescription. Radiologists may not routinely comment on T-junction unless specifically requested.

Acute & Rehabilitation Management

Acute Phase — PEACE Protocol (First 72hrs)

Protection: Crutches if antalgic gait; no forced stretching in first 48hrs
Elevation: Posterior thigh elevated to reduce haematoma accumulation
Avoid anti-inflammatory modalities: The inflammatory response is essential for optimal healing — avoid NSAIDs in first 48hrs if possible, avoid ice (reduces haematoma perfusion), avoid CSI
Compression: Compression bandage or shorts — limits haematoma expansion
Education: Realistic timeline, reinjury risk if rushed, importance of criteria-based progression
Haematoma aspiration: If US confirms large haematoma (>5cm) at 48–72hrs when liquefaction has occurred — US-guided aspiration accelerates return to function
Analgesics: Paracetamol preferred. NSAIDs after 48hrs are reasonable for ongoing pain management.

Rehabilitation Progression

Phase	Timing	Key Interventions
Phase 1: Inflammatory	0–3 days	PEACE. Gentle pain-free ROM. Isometric holds at shortened range only. Aquatic walking if available.
Phase 2: Proliferative	Days 3 – ~3 weeks	Progressive lengthening exercises. Prone hip extension, supine bridge, Nordic hamstring introduction at shortened range. Aqua running. Straight-line jogging when pain-free.
Phase 3: Remodelling	3–6+ weeks	Heavy eccentric loading: Nordic hamstring curl, Romanian deadlift, single-leg RDL. Running speed progression. Transition to criterion-based assessment.
Phase 4: Sport-specific	6 weeks+	Sprint acceleration. Reactive agility. Sport-specific drills. Team training integration.

KZN Network Poll Case — Elite Sprinter

A world championship-level sprinter sustained a Grade 2a hamstring tear 4 weeks before competition. Group poll: 26/26 respondents chose multifactorial RTP decision-making. The athlete competed and achieved a podium finish. Key factors: small lesion (<5cm, <20% cross-section), career-defining competition, experienced athlete with high body awareness, full informed consent, pre-agreed withdrawal triggers, pacing strategy modification.

This case illustrates that multifactorial, contextual RTP decision-making — not rigid criteria adherence — is the ethical approach in high-performance sport. Documentation of the shared decision-making process is essential.

Criteria-Based Return to Play

Grade 1a/1b

3–7 days

Functional injury — criteria-based, often rapid

Grade 2a

14–21 days

Small MTJ tear

Grade 2b/2c

3–6 weeks

Moderate tear

Grade 3a

6–12 weeks

Subtotal tear + haematoma

T-Junction

+2–4 weeks

Additional time above standard grade RTP

Grade 3b (avulsion)

4–6 months

Surgical repair required

RTP Criteria Checklist

Pain-free at end-range hip flexion with knee extended (90/90 straight leg raise)

Hamstring strength ≥90% LSI at test speed (isokinetic or NordBord)

H:Q ratio ≥0.6 — hamstring:quadriceps functional ratio

Pain-free sprint at 100% maximal speed on sprint test

Nordic hamstring drop test — no pain or weakness asymmetry

Contextual factors assessed — competition importance, career stage, shared decision-making documented

Reinjury Prevention — After Return to Sport

Nordic hamstring programme: minimum 3 sessions/week ongoing throughout season — 51% reduction in hamstring injury incidence (van der Horst 2015)
Progressive sprint loading during pre-season — do not return to maximal sprinting without sprint preparation block
Load monitoring: GPS-based acute:chronic workload ratio — maintain ratio between 0.8 and 1.3
Sleep and recovery monitoring — fatigue is the dominant injury risk predictor in congested fixture periods
Reassess biomechanics: excessive anterior pelvic tilt, hip flexor tightness, and hamstring-dominant fatigue patterns — correct with targeted programme

Copenhagen Adduction Exercise

Evidence review on groin injury prevention and adductor strength

📚 KZN Sports Med Network · Oct 2025

Evidence Overview

The Copenhagen Adduction Exercise (CAE) is the most studied intervention for adductor strength in football/soccer. Recent systematic review data (shared in KZN group) provides important nuance.

What the Evidence Shows

CAE significantly improves eccentric adductor strength

Consistent finding across studies — strength gains of 20–35% in 8–12 week programmes

CAE does NOT significantly reduce groin injury prevalence

Key finding discussed in KZN group: injury prevention effect is non-significant in most RCTs. Strong muscles ≠ necessarily fewer injuries.

Dose matters: minimum 30 reps/week × 8 weeks required for strength effect

Sub-threshold dosing produces minimal benefit. Compliance is a major real-world issue.

💡 Clinical ImplicationCAE remains a valuable exercise for adductor strength development and rehabilitation after groin injury — but should not be positioned as a standalone injury prevention tool. Multifactorial groin injury prevention programmes (FIFA 11+, load management, hip strengthening) remain the evidence-based recommendation.

Imaging for Groin / Adductor Pathology

Ultrasound — First Line

Acute

Adductor longus origin assessment

Tears, tendinopathy, haematoma at pubic insertion. Dynamic assessment. Guide for injection if indicated.

MRI

MRI Pelvis — Groin Pain Workup

Comprehensive

CORONAL T2 fat-sat — adductor origin

Adductor longus, brevis, gracilis, pectineus assessment. Pubic symphysis oedema (osteitis pubis). Stress fracture of pubic ramus. Hip labral pathology — cannot evaluate groin pain without excluding hip source.

CAE as a Clinical Tool

Correct Indications for CAE

Rehabilitation: Adductor strain recovery — progressive eccentric loading is evidence-based treatment
Strength development: Building adductor strength capacity in high-risk athletes (football, hockey, rugby)
Return to sport: Loading progression phase of groin injury rehabilitation
NOT as standalone injury prevention: Combine with comprehensive warm-up programme

Exercise Technique & Dosage

Partner exercise: lower limb stabilised by partner at ankle/knee
Side-plank position from knee — progress to foot as strength builds
Eccentric phase: controlled hip adduction away from midline
Therapeutic dose: 3–4 sets of 10–12 reps, 3×/week minimum
Prevention dose: minimum 30 reps/week across 8+ weeks
Progress via: lever length (knee → foot), added load, sets/reps

Groin Injury RTP Criteria

Adductor Strength

≥90%

LSI — compare to uninjured side

Pain-Free

0/10

At rest and with sport-specific activities

💡 Key Message from KZN DiscussionStrong adductors are a good thing — but the injury prevention evidence for CAE specifically is weaker than commonly believed. Set realistic expectations with athletes and coaches. Use CAE as part of a comprehensive programme, not as a "magic" prevention exercise.

Lateral Ankle Ligament Injury

Assessment, acute management and rehabilitation of lateral ankle sprains

📚 KZN Sports Med Network · Oct 2025

Priority Assessment Order

🚨 Always examine the Achilles tendon FIRST (Thompson test) before assessing ankle ligaments. Missing an Achilles rupture is a significant clinical error.

Lateral Ankle Ligament Complex

ATFL (Anterior Talofibular): Most commonly injured — inversion + plantarflexion mechanism
CFL (Calcaneofibular): Second most common — provides stability in neutral and dorsiflexion
PTFL (Posterior Talofibular): Rarely injured in isolation — severe injury mechanism

Ottawa Ankle Rules — Imaging Decision

✅ Ottawa Rules have near-100% sensitivity for clinically significant fracture. Apply to every acute ankle injury.

X-ray indicated if: bony tenderness at posterior edge or tip of lateral malleolus

X-ray indicated if: bony tenderness at posterior edge or tip of medial malleolus

X-ray indicated if: bony tenderness at navicular OR base of 5th metatarsal

X-ray indicated if: inability to weight bear immediately after injury AND in ED

Key Clinical Tests

Anterior Drawer Test — ATFL integrity

Forward talar translation in plantarflexion. Positive: >3mm vs contralateral or soft end-feel. Most useful after 5 days when acute swelling/spasm reduces.

Talar Tilt Test — CFL integrity

Inversion stress in neutral — increased tilt vs contralateral

Dorsiflexion ROM — critical functional measure

Weight-bearing lunge test: <10cm from wall = significant restriction. Full DF restoration is critical — limited DF is associated with increased ACL and recurrent ankle sprain risk.

Imaging

X-Ray — Ottawa Rules Driven

If Ottawa +ve

AP, Mortise, Lateral ankle views

Exclude fibula fracture (avulsion vs Weber), medial malleolus fracture, talar dome osteochondral lesion, 5th metatarsal fracture (Jones vs avulsion distinction critical — management differs). Ottawa foot rules: navicular + 5th MT base.

MRI

MRI Ankle — Selected Indications

Indicated

Persistent pain >6 weeks despite conservative management

Osteochondral lesion of talus (OLT) — most commonly missed diagnosis in "chronic ankle sprain". MRI identifies chondral and bony OLT. Also: peroneal tendon tear, syndesmotic injury assessment.

Pre-operative

Surgical planning for ligament reconstruction

Broström repair assessment — define ligament quality, exclude concurrent pathology (peroneal tendons, subtalar joint, OLT).

Ultrasound

Dynamic

ATFL assessment + dynamic stress testing

Dynamic inversion stress under US — visualise talar tilt in real time. Peroneal tendon subluxation assessment. Guide for injection therapy if indicated.

Management — KZN Consensus Key Points

🚫 Moon boots (CAM walkers) are contraindicated in lateral ankle sprains per KZN group discussion (Dr MacIntyre). They promote disuse and delay functional recovery.

Acute Phase (0–72hrs)

POLICE: Protection, Optimal Loading, Ice, Compression, Elevation
Early weight bearing as tolerated — facilitates proprioceptive input
Supportive taping or functional brace (not immobilising boot)
NSAIDs for first 3–5 days (pain and swelling management)
Avoid complete rest — early mobilisation is superior to immobilisation

Subacute Rehabilitation Focus

Full dorsiflexion restoration — #1 priority

Weight-bearing calf stretches, joint mobilisation, lunge test monitoring. DF deficit = recurrent sprain AND increased ACL risk. Do not progress to RTP without this.

Progressive proprioceptive training

Single-leg balance (eyes open → closed → unstable surface), wobble board, BOSU — evidence strongest for reducing recurrent sprain

Peroneal strengthening

Theraband eversion, lateral step-ups, single-leg dip

📊 Surgery: 80% of ankle ligament injuries heal without surgery. Surgical reconstruction (Broström) indicated after 6 weeks of failed structured conservative management with confirmed instability.

Return to Play

Grade I

3–7d

Mild sprain — criteria-based

Grade II

2–6wk

Partial ligament tear

Grade III

6–12wk

Complete rupture — conservative

Post-Broström

4–6mo

Surgical reconstruction RTP

RTP Criteria

Full pain-free dorsiflexion (weight-bearing lunge ≥10cm from wall)
Single-leg hop for distance ≥90% contralateral
Figure-of-8 run, star excursion balance test ≥90% symmetry
Sport-specific agility completed pain-free
Athlete confidence — absence of giving way

⚠️ KZN Group Insight: The ankle may "feel normal" at 12 months even with objective deficits — objective testing is essential. Recurrent sprains are not inevitable if rehabilitation is completed fully.

Heel Pain / Baxter's Nerve Impingement

Differential diagnosis of plantar heel pain including Baxter's nerve entrapment

📚 KZN Sports Med Network · Jul 2025

Differential Diagnosis — Plantar Heel Pain

Heel pain has multiple causes and correct diagnosis is essential — management differs significantly. The KZN group highlighted Baxter's nerve as an under-diagnosed cause.

Differential Diagnosis Table

Diagnosis	Key Features	Distinguishing Finding
Plantar Fasciitis	Medial plantar heel, first-step pain, worse in AM	Pain at medial calcaneal tuberosity; windlass test positive
Baxter's Nerve	Burning, tingling, medial heel — persists throughout day	Pain slightly proximal/posterior to PF origin; neurological quality; diagnostic nerve block confirms
Tarsal Tunnel Syndrome	Medial ankle to plantar foot, Tinel's at tarsal tunnel	Tinel's sign at posterior tibial nerve below medial malleolus
Fat Pad Syndrome	Central heel, worse with heel strike, diffuse	Central pad, not medial tuberosity; common in older athletes
Calcaneal Stress Fracture	Diffuse heel pain, worse with activity, bone tenderness	Squeeze test positive; MRI confirms; exclude REDs
S1 Radiculopathy	Posterior heel + calf + lateral foot	Dermatomal distribution; positive SLR; lumbar signs
Master's Knot of Henry	Plantar midfoot, long flexor crossing point	Pain at medial plantar midfoot — not heel; FHL/FDL crossing

Baxter's Nerve — Clinical Recognition

⚠️ Baxter's nerve (first branch of lateral plantar nerve) is frequently misdiagnosed as plantar fasciitis. Classic triad: burning pain, medial heel location, persists throughout the day (unlike PF first-step pain).

Burning / neuralgic quality of pain — key differentiator

Pain does not resolve after initial walking (unlike PF)

Tenderness slightly more proximal than PF origin

US-guided nerve block is diagnostic AND therapeutic

Imaging in Plantar Heel Pain

Ultrasound — First Line

PF Assessment

Plantar fascia thickness and echogenicity

Normal: <4mm. PF: >4mm with hypoechogenicity at origin. Dynamic assessment — assess with ankle in dorsiflexion. Guide for PRP or CSI injection at plantar fascia insertion.

Baxter's

First branch lateral plantar nerve — US-guided block

US-guided injection at Baxter's nerve (first branch lateral plantar nerve, between AHB and QP muscles). Diagnostic: relief confirms diagnosis. Therapeutic: corticosteroid + LA. Superior accuracy vs landmark technique.

X-Ray

Baseline

Lateral calcaneus view

Calcaneal spur (present in 15–25% of asymptomatic population — not diagnostic of PF). Exclude calcaneal stress fracture (early changes may be subtle — use MRI if suspected).

MRI

MRI — Selected Cases

Calcaneal Stress Fracture

T2 STIR — bone marrow oedema

Gold standard for stress fracture. T1 low signal, T2 high signal at fracture site. Must exclude in: female distance runners, REDs risk population, unexplained diffuse heel pain with activity history.

Management by Diagnosis

Plantar Fasciitis — Evidence-Based Protocol

Load management — reduce running volume temporarily (not cessation)
Calf stretching (soleus + gastrocnemius) — Achilles flexibility reduces plantar fascial load
Plantar fascia-specific stretch: "towel curl" stretch in AM before first step
Orthotic support: heel cup, semi-rigid insole — temporary off-loading
Night splint: for significant morning pain — maintains DF during sleep
Shockwave therapy (ESWT): first-line for chronic PF (>3 months) — strong evidence
US-guided CSI: effective short-term; avoid repeat (fat pad atrophy risk)
PRP: superior to CSI at 6–12 months — consider if CSI failed

Baxter's Nerve Impingement

US-guided injection (corticosteroid + LA) at first branch of lateral plantar nerve: diagnostic + therapeutic
Address causative factors: ABductor hallucis tightness, pes planus, leg length discrepancy
Activity modification during treatment
Surgical neurectomy: reserved for cases refractory to 6+ months conservative management

Return to Activity

Plantar Fasciitis

6–12wk

Acute — with appropriate management

Chronic PF

3–6mo

After ESWT / combined treatment

Stress Fracture

8–12wk

Non-weight-bearing phase + graded loading

💡 Key MessagePain-free walking precedes jogging precedes running. Volume before intensity. A structured return-to-run programme starting at 50% of pre-injury volume with 10% weekly increases reduces recurrence significantly.

Peri-operative Nutrition

Pre- and post-surgical nutritional optimisation for the active patient

📚 KZN Sports Med Network · Oct 2025

Why Nutrition Matters Peri-operatively

Nutritional status is a modifiable determinant of surgical outcomes. Poor pre-operative nutrition delays wound healing, increases infection risk, and lengthens recovery. Athletes are not immune — caloric restriction "to reduce weight" before surgery is actively harmful.

Key Principles

Screen for RED-S / Low Energy Availability before surgery

Especially in female athletes, runners, and aesthetic sport athletes. Underfeeding before surgery significantly impairs healing capacity.

Energy and protein needs remain HIGH during immobilisation

The body is actively repairing tissue post-operatively — under-fuelling delays recovery even when exercise volume is low.

Elite athletes: Informed Sport / NSF certified products only

Anti-doping compliance is non-negotiable regardless of clinical context.

Relevant Laboratory Assessment

Serum albumin / prealbumin — protein status (low albumin = poor surgical predictor)
25-OH Vitamin D — deficiency very common; supplement if <75 nmol/L
FBC — iron deficiency and anaemia impair healing and rehabilitation
HbA1c in diabetic patients — optimise glycaemic control pre-operatively

Nutritional Preparation Before Surgery

Carbohydrate Loading (ERAS Protocol)

✅ Carbohydrate loading is established ERAS (Enhanced Recovery After Surgery) practice — reduces post-operative insulin resistance and muscle catabolism.

Nutricia Preload or Resource Fruit — 400mL the night before surgery
200mL 2–3 hours before surgery (clear fluid — generally permitted up to 2hrs pre-op)
Confirm fasting protocol with anaesthesiologist — most now permit clear carbohydrate drinks to 2hrs

Protein Optimisation

Target: 1.6–2.2g protein/kg/day in the weeks before surgery
Spread across 4–5 meals — 30–40g protein per meal as target
Leucine-rich protein sources prioritised (dairy, eggs, meat, legumes)
If oral intake limited: high-protein supplement drinks (Fresubin, Ensure High Protein)

Micronutrient Preparation

Vitamin C 500–1000mg/day — essential for collagen synthesis and wound healing
Vitamin D 2000–4000 IU/day if deficient — immune function and muscle recovery
Zinc: 15–30mg/day — wound healing and immune function
Iron: supplement if anaemic (discuss with surgeon — timing relative to surgery)

Nutritional Support After Surgery

Recommended Products (Group Discussion)

Fresubin 3.2 kcal — high-calorie, high-protein supplement

For athletes with high energy demands and reduced post-operative mobility. Dense calorie and protein delivery in small volume.

Medtrition Vitament sachet — comprehensive micronutrient support

Discussed in group for post-operative recovery phase — covers micronutrient gaps during restricted eating.

BCAAs (Branch Chain Amino Acids)

Reduces muscle protein breakdown during immobilisation. Choose Informed Sport certified brands. Applied Nutrition BCAAs confirmed Informed Sport certified and available in KZN.

Connective Tissue Healing Protocol

Hydrolysed collagen 15g + Vitamin C 50mg — 1 hour before physiotherapy/exercise
Evidence: increases collagen synthesis in tendons and ligaments during the loading stimulus
Vitamin C is the co-factor — must be taken together, not separately
Continue for the full duration of connective tissue healing phase (weeks to months depending on structure)

Nutritional Continuity Through Rehabilitation

💡 Core PrincipleDo not reduce energy intake as exercise resumes — caloric needs increase as training load builds. The transition from surgery to full training is a sustained high-demand period.

Rehabilitation Nutrition Targets

Protein: maintain ≥1.8–2.2g/kg/day throughout rehabilitation
Carbohydrate: increase progressively as training volume increases — carbohydrate periodisation
Continue Vitamin C + D through tendon/bone healing phase
Creatine: emerging evidence supports use during immobilisation to attenuate muscle atrophy — consider from early post-operative phase
Return to pre-injury energy intake targets as full training resumes

⚠️ Monitor for LEA (Low Energy Availability) during rehabilitation — athletes who restrict food intake while training increasingly hard are at risk of RED-S recurrence or first presentation.

Creatine Supplementation

Evidence base, dosing, practical guidance and emerging applications

📚 KZN Sports Med Network · Mar 2026

What the Evidence Shows

✅ Creatine monohydrate is the most extensively studied sports supplement in existence. The evidence base for safety and efficacy is robust across decades of research.

Established Benefits

Increased phosphocreatine resynthesis → improved high-intensity repeat performance

Most benefit in short-duration, high-intensity, repeated efforts: sprinting, weightlifting, team sports with repeated sprints

Increased lean muscle mass with resistance training

Via increased training capacity + intracellular water → satellite cell activation. Effect size: ~2–4kg lean mass advantage over training period vs placebo.

Attenuates muscle atrophy during immobilisation

Post-surgical and post-injury application: significant reduction in muscle mass loss. Particularly valuable in the early post-operative phase.

Safety Profile

No evidence of renal harm in healthy individuals — even with long-term use
Elevated serum creatinine on blood tests is expected and does not indicate renal damage (creatinine is a creatine metabolite)
Not prohibited by WADA — freely permitted in competition
Adolescents: insufficient long-term safety data — adult supervision and sports dietitian involvement recommended

Population-Specific Benefits

Highest Benefit Groups

Population	Reason	Expected Benefit
Vegetarians / Vegans	Lower dietary creatine intake → lower baseline muscle stores	Largest performance and strength gains
Power / Strength athletes	Primary energy system matches creatine mechanism	Strong
Team sport athletes	Repeated sprint and high-intensity effort demands	Moderate–Strong
Post-surgical rehabilitation	Attenuates immobilisation-related atrophy	Moderate (emerging evidence)

Limited Benefit Groups

Pure endurance athletes — minimal direct performance benefit for long-duration aerobic events
Endurance athletes pre-race: consider stopping 3–7 days before weight-sensitive competition (intracellular water retention adds ~1–2kg body weight)

Practical Dosing Guide

Two Approaches — Same End Result

Protocol	Dose	Time to Saturation	Notes
Loading then Maintenance	20–25g/day in 4 divided doses × 7 days, then 3–5g/day	~7 days	GI upset possible during loading. Useful if time-sensitive.
Maintenance Only	3–5g/day continuously	~28 days	Better tolerated. No meaningful long-term difference in outcome.

Practical Points

Creatine monohydrate powder = gold standard

No alternative form (creatine ethyl ester, buffered creatine, Kre-Alkalyn etc.) has demonstrated superiority. More expensive forms are marketing, not science.

No need for carbohydrate or grape juice co-ingestion

Insulin-mediated creatine uptake is a minor effect — dissolve in water, take at any convenient time

No cycling required

No evidence base for cycling on/off. Continuous use is safe and maintains saturation without "reloading" periods.

Hydration: drink adequate water

Creatine draws water into muscle cells — maintain good hydration, especially in hot South African training environments

Emerging & Novel Applications

Concussion & Neuroprotection

Growing evidence suggests creatine may have neuroprotective effects relevant to concussion management and TBI recovery. Not yet in standard guidelines — but mechanistically rational.

The brain has high creatine demand and is vulnerable to energy depletion post-concussion
Animal and preliminary human studies show reduced secondary injury with pre- and post-injury creatine supplementation
Ongoing research — watch this space. Consider in contact sport athletes as a general health supplement given the safety profile.

Sleep Deprivation & Cognitive Performance

Creatine supplementation attenuates cognitive performance decline associated with sleep deprivation
Relevant for athletes in travel, tournament, and multi-day competition contexts
Emerging data — not yet in standard recommendations but adds to the rationale for general use in athletes

Older Athletes (>55 years)

Age-related muscle loss (sarcopenia) — creatine + resistance training shows additive benefit
Bone density — preliminary evidence for positive effects on bone health
Masters athletes: consider as a standard part of the supplement toolkit

Youth Athlete Nutrition & Supplements

Caffeine risks, supplement contamination and the food-first approach in school-age athletes

📚 KZN Sports Med Network · Apr 2026

The Supplement Risk Landscape for Young Athletes

🚨 10–28% of commercially available sports supplements contain substances not declared on the label — including SARMs, stimulants and prohormones. This is not a marginal risk.

Epidemiology

16–25% of high school athletes use dietary supplements

Most supplement use is driven by peers, social media and coaches — not medical advice

Most common contaminants: SARMs, stimulants, prohormones

All WADA-prohibited. A positive doping test from a contaminated supplement is still a violation — strict liability applies at all levels including schoolboy sport.

Clinician's Role

Ask directly about supplement use — it will not be volunteered
Educate athletes, parents and coaches as a unit — peer and coach pressure is the primary driver
Recommend Informed Sport certified products only if supplementation is used
Refer to sports dietitian for young athletes with performance goals

Caffeine in Young Athletes

Common Sources — Cumulative Intake Often Underestimated

Source	Caffeine Content	Key Concern
Energy drinks	80–200mg per can	Often consumed multiple times daily — cumulative dose ignored
Pre-workout supplements	150–350mg per serving	Adult doses consumed by 14–16 year olds — manufacturers set no youth dose
Coffee (filter/plunger)	80–120mg per cup	Baseline intake often not counted when stacking with supplements
Caffeinated sports gels	25–75mg per gel	Stacks with other sources during competition

⚠️ The biggest performance risk from caffeine in young athletes is not the caffeine itself — it is sleep disruption. Even moderate intake affects sleep onset and quality. Sleep is the single most powerful recovery tool available.

Practical Rules for Young Athletes

If you cannot calculate the mg dose — do not use the product

Applies to all pre-workout and energy products. Dose transparency is a safety baseline.

No caffeine within 6 hours of sleep

No established safe dose in under-18s — adult guidance is 3mg/kg/day maximum

Supplement Safety Framework

Third-Party Certification — Non-Negotiable for Competitive Athletes

✅ Informed Sport and NSF Certified for Sport are the gold-standard third-party testing marks. Products bearing these marks are batch-tested for WADA-prohibited substances.

Informed Sport — globally recognised, widely available

Applied Nutrition BCAAs carry Informed Sport certification and are available in KZN — confirmed by the group.

NSF Certified for Sport — particularly common in US-based products

No certification = unknown contamination risk = not suitable for competitive athletes

Supplements with Evidence in Adolescent Athletes

Supplement	Evidence	Recommendation
Vitamin D	Strong — deficiency common in SA indoor athletes	Screen and supplement if deficient
Iron	Strong — anaemia impairs performance	Screen FBC + ferritin; supplement if low
Omega-3	Moderate — anti-inflammatory, brain health	Food first (oily fish); supplement if diet lacking
Creatine	Strong in adults — adolescent data limited	Use with caution; dietitian involvement; adult supervision
Protein powder	Modest — if dietary protein inadequate	Food first always; supplement only if shortfall confirmed

The Food-First Philosophy

💡 Core MessageThe vast majority of young athletes can meet all nutritional needs from food alone. Supplement use should be the exception, not the default. Educate athletes, parents and coaches together — the conversation must happen as a unit.

Core Nutritional Foundations

Protein: 3 meals per day, each with 30g protein — achievable from food (eggs, meat, fish, dairy, legumes)
Carbohydrate periodisation: More carbohydrate on training days, less on rest days — teaches young athletes to match fuel to demand
Hydration: 500mL in 2 hours before training; monitor urine colour (pale yellow = adequate)
Recovery nutrition: Protein + carbohydrate within 30–60 minutes post-training
Sleep: The most powerful recovery tool — prioritise above all supplements. 8–10hrs in adolescents.

✅ Establishing good nutritional habits in adolescence has lifetime performance and health benefits. This is where the highest-yield intervention happens — not in supplements.

RED-S / Low Energy Availability

Relative Energy Deficiency in Sport — recognition, assessment and management

📚 KZN Sports Med Network · Sep 2025

Understanding RED-S

RED-S vs Female Athlete Triad

RED-S is the updated, expanded model of what was previously known as the Female Athlete Triad. It includes male athletes and recognises that the consequences of low energy availability extend far beyond the reproductive system.

Female Athlete Triad (old model)

Energy deficiency
Menstrual dysfunction
Low bone density

RED-S (current model)

All triad features PLUS:
Immune dysfunction
Cardiovascular impairment
Psychological effects
Haematological consequences
GI disturbance
Applies to male athletes equally

🚨 Exclude RED-S before diagnosing Overtraining Syndrome (OTS). They share features — fatigue, performance decline, mood disturbance — but management is fundamentally different. Fuelling fixes LEA. Rest does not.

Energy Availability — The Core Concept

Energy Availability = (Energy Intake − Exercise Energy Expenditure) ÷ kg Fat-Free Mass

Target: ≥45 kcal/kg FFM/day. Below this threshold, the body begins down-regulating physiological functions to conserve energy.

Clinical Recognition

Red Flags by System

Female Athletes

Primary or secondary amenorrhoea
Oligomenorrhoea (<9 cycles/year)
Bone stress injuries (1 high-risk or ≥2 low-risk)
Frequent illness / poor immune function
Unexplained performance decline
Mood disturbance, irritability, depression

Male Athletes — Often Missed

Low testosterone
Loss of morning erections
Libido reduction
Bone stress injuries (same threshold)
Unexplained fatigue and performance plateau
Mood disturbance

⚠️ Bone stress injury is the primary clinical indicator. One high-risk BSI (sacral, femoral neck, anterior tibia, navicular, 2nd metatarsal) or ≥2 low-risk BSIs = investigate for RED-S regardless of other symptoms.

💡 KZN Network ResourceA custom REDS CAT-2 traffic light digital assessment tool has been developed for the KZN Sports Med Network. the group

Investigation Framework

Laboratory Investigations

Domain	Tests	Notes
Hormonal (Female)	LH, FSH, oestradiol, prolactin	Low LH + FSH = hypothalamic suppression from LEA
Hormonal (Male)	Total testosterone, LH, FSH	Morning fasting sample. Low T with low/normal LH = hypothalamic pattern
Thyroid	TSH, T4	Exclude thyroid pathology as confounder
Cortisol	AM fasting cortisol, IGF-1	Chronically elevated in RED-S — suppresses reproductive axis
Nutritional markers	Ferritin, FBC, Vit D, B12, folate, zinc, albumin	Multiple deficiencies common in LEA
Bone markers	P1NP (formation), CTX (resorption)	Elevated CTX + suppressed P1NP = significant bone metabolic disruption

Bone Densitometry (DXA)

Indicated in all confirmed RED-S cases
Use Z-score (age-matched) — not T-score — in athletes under 50
Z-score ≤−1.0 = low for age; Z-score ≤−2.0 = significantly low
Repeat annually to monitor trajectory
Lumbar spine + total hip + total body composition

Management — The Fix is Fuel

✅ The primary intervention is increasing energy availability to ≥45 kcal/kg FFM/day — by increasing intake, reducing training load, or both. Sports dietitian referral is mandatory.

Energy Availability Restoration

Calculate current EA: (Energy Intake − Exercise EE) ÷ kg FFM
Target: ≥45 kcal/kg FFM/day
Gradual increase preferred over rapid refeeding — refeeding syndrome risk in severe cases
Dietitian-led with physician oversight — multidisciplinary approach
If disordered eating is present: psychologist involvement is essential, not optional

Bone Protection

Calcium 1000–1500mg/day (dietary first; supplement to reach target)
Vitamin D — maintain 25-OH Vit D ≥75 nmol/L
The OCP does NOT protect bone in RED-S — this is a common misconception. Fuelling is the intervention; the OCP masks menstrual dysfunction without addressing the cause.
Maintain weight-bearing exercise — do not remove loading entirely, as bone stimulus is still needed

REDS CAT-2 Traffic Light — Return to Training

RED: No training or competition. Full medical supervision.

AMBER: Modified training only — no high-risk sport (contact, endurance events). Monitored closely.

GREEN: Full participation after criteria met.

GREEN Criteria

Energy availability restored — confirmed by dietitian assessment
Menstrual function restored in females (3 consecutive cycles)
Testosterone normalised in males
Bone healing confirmed if stress fracture present (MRI/XR)
Psychological clearance if disordered eating is present

Tendon Injectables: CSI, PRP & Collagen

Comparative evidence and practical clinical guidance for tendinopathy injection therapy

📚 KZN Sports Med Network · Oct 2025

The Injection Landscape — Setting Expectations

Injection therapies are adjuncts to rehabilitation — not standalone treatments. The right injection at the wrong stage, or without structured progressive loading, produces limited benefit.

Head-to-Head Comparison

Agent	Short-term (0–3mo)	Medium-term (3–6mo)	Long-term (6–12mo)	Best Use
CSI	Best	No advantage	May be worse	Inflammatory phase, facilitating physio engagement
PRP	Moderate	Superior	Superior	Proliferative phase, failed CSI, performance-critical athletes
Collagen	Pilot data only	Unknown	Unknown	Experimental — not first-line

Before Any Injection — Checklist

Confirm diagnosis on ultrasound

Tendon thickening, hypoechogenicity, neovascularity — confirm tendinopathy vs other pathology

Stage the tendon on Cook & Purdam continuum

Stage determines which injection is appropriate — or if injection is appropriate at all

Elite athletes: WADA check mandatory before any injection

PRP is permitted. CSI: permitted but route-dependent at competition. Collagen (GUNA): contamination risk — batch certification required.

Image guidance is mandatory for all tendon injections

Accuracy of landmark-guided injections is poor — peritendinous placement is critical to avoid intratendinous delivery

Corticosteroid Injection — Evidence & Practice

What It Does

Potent anti-inflammatory effect — reduces pain and local inflammatory response
Best short-term pain relief of all injection options (6–12 weeks)
No long-term benefit over placebo at 6+ months in most RCTs
May facilitate engagement with physiotherapy by reducing pain barrier

Important Safety Considerations

Avoid intratendinous injection — risk of tendon rupture

Peritendinous placement only. US guidance is essential to ensure correct placement.

Maximum 2–3 injections per tendon — cumulative tissue harm

In the proliferative and remodelling phases: CSI disrupts collagen synthesis

Corticosteroids inhibit the collagen matrix formation and cross-linking needed for tendon repair — timing matters

Competition timing: route-dependent reporting requirements

Intra-articular CSI is generally permitted. Intra-muscular or IV CSI at competition may require declaration or TUE depending on sport. Check WADA and sport-specific rules.

Platelet-Rich Plasma — Evidence & Practice

Mechanism & Evidence

Concentrated autologous platelets deliver growth factors (PDGF, TGF-β, VEGF) directly to tendon
Stimulates tenocyte proliferation and collagen synthesis
Superior outcomes vs CSI at 3–12 months — now supported by multiple RCTs and meta-analyses
WADA permitted — not prohibited in any form

Practical Guidance

LP-PRP (leucocyte-poor) preferred for tendons

LR-PRP (leucocyte-rich) for muscle injuries. LP-PRP reduces the pro-inflammatory leucocyte load — less appropriate in tendon. Standardise your preparation protocol.

Expect 3–5 days of increased soreness post-injection

The inflammatory response is part of the therapeutic mechanism — counsel patients and plan for this. Isometric loading only in this window.

Optimal stage: proliferative phase

Tendon in reactive or early dysrepair phase — after the acute inflammatory window has passed

Image guidance mandatory — intratendinous or peritendinous depending on pathology location

Collagen Injection — Where the Evidence Stands

⚠️ Collagen injection for tendinopathy is an emerging, experimental therapy. Evidence is at pilot study level — not yet established practice. The group discussed clinical experience with GUNA Collagen.

Current Evidence Status

Exogenous collagen injection (GUNA Collagen and similar products) — pilot studies show promising results
Mechanism: delivering collagen precursors directly to the tendon environment
No large RCT data yet — positive clinical experience reported in group discussion
Cannot yet be positioned alongside CSI or PRP in evidence hierarchy

Safety Considerations — Elite Athletes

Contamination risk — batch certification required

Cannot guarantee WADA compliance without independent batch testing documentation. Do not use in competitive athletes without batch certification from the manufacturer.

Image guidance mandatory

May have a role in degenerative tendon pathology refractory to other treatments

The theoretical rationale is strongest where tendon matrix quality is poor and conventional loading programmes have been exhausted

Tendon Healing & Rehabilitation

The Cook & Purdam continuum model and phase-based loading progression

📚 KZN Sports Med Network · Oct 2025 · Cook & Purdam 2009

Cook & Purdam Continuum Model

💡 Tendon pathology exists on a continuum — not as discrete stages. Understanding where a tendon sits determines what treatment will help and what will harm.

The Three Stages

Stage	Pathology	US Appearance	Reversibility
Reactive	Acute overload — non-inflammatory cell proliferation, proteoglycan accumulation	Uniform thickening, normal echogenicity, fibrillar pattern preserved	Fully reversible with appropriate load management
Dysrepair	Failed healing — matrix disruption, collagen disorganisation, neovascularity	Heterogeneous echogenicity, fibrillar disruption, power Doppler positive	Partially reversible
Degenerative	Cell death, matrix failure, islands of dysrepair within structurally normal tendon	Hypoechoic nodules, calcification, focal tears, marked disorganisation	Not reversible — symptom management focus

Critical Implication

⚠️ The same treatment works differently at different stages. Heavy loading is therapeutic in the remodelling phase but harmful in the acute reactive phase. The injection that helps in proliferation disrupts collagen synthesis in remodelling. Stage the tendon before choosing the intervention.

Early Phases — Reactive to Proliferative

Inflammatory Phase

0–7 days

▼

Isometric exercise: 5 sets × 45 seconds at 70–80% MVC, twice daily — immediate pain-relief effect via cortical inhibition
TENS for additional pain modulation
Load modification — reduce provocative activity but do not immobilise
❌ No shockwave therapy — acute reactive tendons do not respond; may worsen
❌ No corticosteroid injection — disrupts the healing cascade at this stage
❌ No aggressive stretching — increases compressive load at insertion

Proliferative Phase

1–6 weeks

▼

PRP injection: Optimal window — stimulates tenocyte proliferation and collagen synthesis when the matrix is receptive
Class IV laser therapy: Evidence for pain reduction and facilitation of healing — can be used in this phase
Progressive isotonic loading begins: slow tempo (3s concentric, 3s eccentric)
❌ Avoid corticosteroid injection — disrupts the collagen matrix formation that is actively occurring
❌ Heavy loading not yet appropriate

Later Phases — Remodelling to Sport

Remodelling Phase

6–12 weeks

▼

Heavy slow resistance (HSR): 6 reps × 4 sets at high load — key therapeutic intervention. Kongsgaard 2009: HSR superior to eccentric alone and to CSI at 12 months.
ESWT (Extracorporeal Shockwave Therapy): Strong evidence base in this phase. Radial or focused — both effective for common tendinopathies
Energy storage loading begins: walking lunges, stair descent, light bounding
❌ Avoid corticosteroid injection — inhibits collagen cross-linking at the point when it is most critical

Maturation & Sport Return

3–12 months

▼

Sport-specific loading with progressive energy storage and release demands
Running, sprinting, jumping — volume and intensity built progressively
Maintenance strength programme ongoing — tendons require continued loading stimulus to maintain structural integrity
RTP criteria: NRS ≤3/10 during and after sport-specific loading; strength ≥90% LSI

Common Mistakes in Tendinopathy Management

The Errors That Slow Recovery

Complete rest

Tendons need load to heal. Complete rest causes further deconditioning and does not resolve the underlying pathology. Load management — not load removal.

Stretching into pain at insertion tendons

End-range dorsiflexion stretching for Achilles tendinopathy, for example, increases compressive load at the calcaneal insertion — this is harmful, not helpful. Distinguish insertion from mid-portion tendinopathy.

Repeat corticosteroid injection without rehabilitation

CSI without structured loading programme = temporary symptom relief, no structural improvement, cumulative tendon harm. The injection is the bridge — rehabilitation is the destination.

Starting ESWT too early (acute reactive phase)

Shockwave in the reactive phase is contraindicated — it increases the local mechanical stimulus and can worsen the situation.

Progressing load based on time, not symptoms

Pain is the guide. A "24-hour rule": activity-related pain that settles within 24 hours indicates acceptable load. Pain that persists beyond 24 hours = reduce load.

Return to Play Decision-Making Framework

Multifactorial, contextual and shared decision-making in return to sport

📚 KZN Sports Med Network · Jan 2026

Beyond Criteria — A Decision Framework

💡 "Is the risk of reinjury versus the reward of competition acceptable, quantifiable, and manageable?"

Decision Domains

Clinical Factors

Injury grade (imaging-confirmed)
Pain at rest and with sport-specific activity
Strength, function and performance testing
Reinjury probability estimate
Previous injury history
Psychological readiness

Contextual Factors

Competition importance (league match vs World Championships)
Career stage (early career vs final season)
Financial and contractual implications
Team standing and squad depth
Athlete's informed preference
Support team and monitoring capacity

The Spectrum of RTP Decisions

RTP is not binary. Between "fully fit" and "unavailable" is a spectrum of modified participation options: reduced playing time, positional modification, load monitoring, withdrawal triggers pre-agreed with athlete and coaching staff.

Common Misconceptions

RTP is Not Time-Based Alone

Days and weeks since injury are context — not criteria. A Grade 2a hamstring at day 21 may be cleared in a World Championship context with appropriate risk mitigation. The same grade at day 21 in a low-stakes school league may warrant more conservative management based on athlete development priorities.

RTP is Not Purely Clinical

Psychological readiness is a legitimate clinical criterion — not a "soft" factor
Kinesiophobia (fear of movement) predicts reinjury independently of physical readiness — especially relevant post-ACL, hamstring, ankle
ACL-RSI score <80% = significantly elevated reinjury risk regardless of strength and hop test performance
Shared decision-making is not the clinician abdicating responsibility — it is structured, informed, and documented

Criteria-Based RTP — Still the Foundation

Pain ≤3/10 with sport-specific loading

Strength ≥90% LSI (injury-specific — quad, hamstring, hip abductor etc.)

Functional tests — hop tests, agility, sport-specific tasks

Psychological readiness (ACL-RSI, athlete self-report)

The Shared Decision-Making Process

Steps in a High-Stakes RTP Conversation

1. Present clinical data objectively — injury grade, functional test results, reinjury probability estimate. Do not round the numbers to seem more certain than you are.
2. Explain uncertainty explicitly — "I cannot tell you with certainty that you will not be reinjured. Here is what I know about the risk."
3. Contextualise for the athlete — competition importance, career stage, consequences of reinjury in this context
4. Explore athlete preference — after full information sharing, what does the athlete want? Do not lead this.
5. Define modification and withdrawal criteria — if competing with injury, pre-agree: under what circumstances do they withdraw? (e.g., pain >4/10, gait change)
6. Document thoroughly — the information shared, the athlete's expressed preference, and the agreed plan. This is both ethical practice and medico-legal protection.

🚨 Ensure there is no coercion. The athlete's long-term health must come first. Document that the athlete made an informed, uncoerced decision.

KZN Network Case — Elite Sprinter (Jan 2026)

Case Summary

A world-championship level sprinter sustained a Grade 2a hamstring tear 4 weeks before the competition. The KZN group was polled: How would you approach RTP?

Result: 26 of 26 respondents chose the multifactorial approach. The athlete competed. Outcome: podium finish.

Factors That Justified Modified RTP

Small lesion — Grade 2a on MRI (<5cm, <20% cross-sectional area)

Career-defining competition — World Championships

Experienced elite athlete — high body awareness and self-monitoring capacity

Full informed consent — athlete understood and accepted the risk

Pre-agreed withdrawal triggers established before the event

Pacing strategy modification — event-specific risk mitigation

💡 The Learning PointUnanimous multifactorial consensus from a network of experienced sports medicine clinicians. The case illustrates that rigid criteria-only decision-making fails elite athletes. Context and shared decision-making are not departures from good medicine — they are part of it.

WADA / Anti-Doping

Strict liability, prohibited substances, TUEs and the clinician's role

📚 KZN Sports Med Network · Oct 2025 · WADA Prohibited List

The Foundations

🚨 STRICT LIABILITY: The athlete is responsible for every substance found in their body — regardless of how it got there. "I didn't know" is not a defence. This applies to medications prescribed by their own doctor.

Inadvertent Doping — Real Cases

Athlete	Source	Consequence	Lesson
Therese Johaug	Lip cream (BIAFINE — triamcinolone)	18-month ban	Check every topical product
Andreea Răducan	Cold tablet (pseudoephedrine) — prescribed by team doctor	Olympic gold stripped	Prescriber error = athlete's penalty
Park Tae-hwan	Testosterone injection (Nebido — medical treatment)	18-month ban	TUE required before prescribing
Alain Baxter	US Vicks inhaler (different formulation to UK version)	Olympic bronze stripped	Same brand, different country = different formula
Maria Sharapova	Meldonium — added to Prohibited List during use	2-year ban (reduced)	Monitor list updates annually

💡 Essential Tool: GlobalDRO.comCheck every medication, supplement and topical product before prescribing to any competitive athlete. Filter by sport, country and competition level. Free, regularly updated, the definitive clinical reference.

2026 WADA Prohibited List — Overview

Always Prohibited (In and Out of Competition)

Anabolic agents: AAS, SARMs, clenbuterol, selective androgen receptor modulators
Peptide hormones: EPO, hGH, IGF-1, GHRPs, GHRH analogues, hCG (males)
Beta-2 agonists: Most prohibited — salbutamol permitted up to 1600μg/24h inhaled without TUE; formoterol and salmeterol permitted with TUE only
Hormone and metabolic modulators: GLP-1 agonists (semaglutide, tirzepatide) — check current list status
Diuretics and masking agents: All diuretics prohibited (including prescribed furosemide, spironolactone)
Blood and oxygen manipulation: Autologous/homologous transfusions, HBOCs, xenon gas

In-Competition Only

Stimulants: amphetamines, cocaine, ephedrine (threshold), methylphenidate (ADHD), pseudoephedrine (threshold)
Glucocorticoids: prohibited via all routes except inhaled, topical and local injections — local injections permitted if not IV/IM (check sport-specific rules)
Narcotics: morphine, oxycodone, fentanyl — prohibited in-competition. Tramadol: some sports prohibit (check sport-specific)

Therapeutic Use Exemption

Four Criteria — All Must Be Met

1. Medically necessary — without treatment, athlete's health would be significantly impaired

2. No permitted alternative treatment exists that treats the condition adequately

3. Does not produce additional performance enhancement beyond restoring normal health

4. The medical condition is not a consequence of prior prohibited substance use

Common TUE Scenarios

Condition	Agent	Notes
Asthma	Formoterol, salmeterol	TUE required — must provide spirometry/reversibility data. Salbutamol to 1600μg/24h is TUE-exempt.
ADHD	Methylphenidate, dexamphetamine	Specialist (psychiatrist/neurologist) documentation required. Trial of non-stimulant alternatives expected. Not straightforward.
Hypothyroidism	Levothyroxine	Generally straightforward — thyroid hormone not prohibited. Confirm current list status.
Hypogonadism	Testosterone	Must meet strict criteria. Evidence of primary hypogonadism. Not approved for age-related testosterone decline.

🚨 Apply for TUE BEFORE prescribing the prohibited substance. Retroactive TUEs are very difficult to obtain except in true emergencies.

The Sports Medicine Clinician's Anti-Doping Responsibilities

Mandatory Practices

Check GlobalDRO.com for every prescription to a competitive athlete

No exceptions. One prescription error can end a career — the athlete carries the consequence, not the prescriber.

Ask about all supplements at every consultation

10–28% of supplements contain undeclared prohibited substances. Supplement use changes and patients forget to mention it.

Apply for TUE before prescribing — not after the test

Update knowledge annually — the Prohibited List changes every January

Know your national anti-doping authority: SAIDS (South African Institute for Drug-Free Sport)

⚠️ Common High-Risk Prescriptions to Double-Check: Corticosteroids (route matters at competition), diuretics (all prohibited), beta-2 agonists (threshold and TUE rules apply), stimulants for ADHD (in-competition restrictions), GLP-1 agonists (evolving prohibited status), pseudoephedrine-containing cold medications.

DSD & Gender Eligibility in Sport

Clinical management, World Athletics regulations and the clinician's role

📚 KZN Sports Med Network · Feb 2025 · World Athletics Regulations 2023 & Feb 2025

Key Definitions

Differences of Sex Development (DSD)

DSD is an umbrella term for conditions where chromosomal, gonadal, or anatomical sex development differs from typical male or female patterns. This is a distinct clinical category from transgender identity.

Category	Definition
DSD (46,XY)	46,XY chromosomes with androgen insensitivity or biosynthesis differences — variable testosterone levels, variable virilisation. Includes: complete and partial androgen insensitivity syndrome (CAIS, PAIS), 5-alpha reductase deficiency, others.
Transgender Women	Male puberty and development → gender identity as female. Distinct from DSD — no chromosomal or gonadal difference from typical male at birth.
Transgender Men	Female puberty and development → gender identity as male. No restriction for male category participation under current World Athletics rules.

📍 South African context: The Caster Semenya case remains the most prominent example of DSD regulations in sport. Her case has been heard at CAS and the European Court of Human Rights. Current status: World Athletics regulations upheld at both levels.

World Athletics DSD Regulations (March 2023)

Current Requirements for Female Category Eligibility (DSD Athletes)

46,XY DSD athletes must suppress serum testosterone to <2.5 nmol/L
Must maintain this level for a minimum of 24 months before competing in female category international track events
Ongoing monitoring with World Athletics approved laboratories required
Applies to: track events 400m to one mile, and associated field events

Transgender Women — World Athletics Position

Athletes who have undergone male puberty are excluded from the female category in international track and field under current World Athletics rules
National-level and recreational sport governance varies — governed by individual federations
Policy is evolving — monitor World Athletics communications

⚠️ February 2025 Consultation: World Athletics proposed merging DSD and transgender regulations with a pre-clearance system. Monitor for regulatory updates — this area is actively evolving.

Managing DSD Athletes Seeking Female Category Eligibility

Investigations Required

Investigation	Purpose
Serum total testosterone (repeat × 2)	Baseline and eligibility threshold assessment — single measurement insufficient
LH, FSH, SHBG, DHT, androstenedione	Full androgen profile; characterise biosynthesis pathway
Karyotyping	46,XX vs 46,XY vs mosaic — specialist genetics referral
DXA bone densitometry	Baseline before T suppression — annual monitoring thereafter

Testosterone Suppression Options

GnRH analogues — most effective

Leuprolide, triptorelin — monthly or quarterly depot injection. Most reliable achievement of <2.5 nmol/L threshold.

Oral hormonal contraception — variable efficacy

May not consistently achieve <2.5 nmol/L. Less reliable for regulatory compliance.

Bone Health During T Suppression

Testosterone suppression reduces bone mineral density — this is a real and significant health risk
Calcium 1000–1500mg/day + Vitamin D ≥2000 IU/day throughout suppression
DXA at baseline and annually — monitor Z-score trajectory
Endocrinology specialist involvement mandatory for ongoing management
Testosterone monitoring: every 3 months initially, 6-monthly once stable

Clinical Ethics and Practical Responsibilities

What the Clinician Does

Objective medical assessment and investigation

The clinician's role is health and medical characterisation — not eligibility policing. Provide objective data; the regulatory decision belongs to World Athletics / ASA.

Endocrinology referral for DSD characterisation

T suppression prescribing and monitoring

Bone health monitoring — DXA, supplementation, review

Liaison with World Athletics / ASA medical department

🔒 DSD and gender are highly sensitive medical information — strict confidentiality obligations apply. Disclosure without consent is a serious ethical violation.

💡 Ethical PrincipleProvide compassionate, confidential, medically excellent care. Protect the athlete's health throughout any suppression process. Ensure the athlete understands the medical implications and makes informed decisions — this is the clinician's obligation, independent of regulatory outcomes.

Sinding-Larsen-Johansson Syndrome

Traction apophysitis of the inferior patellar pole in adolescent athletes

📚 KZN Sports Med Network · Paediatric Sports Medicine · Wilczyński et al. 2024

Clinical Overview

SLJ is a traction apophysitis at the inferior patellar pole — the patellar tendon attachment site. It is a self-limiting condition that resolves with skeletal maturity. Conservative management only.

Who Gets It

Age: 10–14 years — peak growth velocity window

More common in males (approximately 2:1)

Sports: football, basketball, gymnastics, running — any sport with high jumping or sprinting demand

Clinical Presentation

Point tenderness at the inferior patellar pole — hallmark sign

Distinguish from Osgood-Schlatter (tibial tubercle, more distal) and patellar tendinopathy (tendon mid-substance, older athlete)

Activity-related pain — worse with running, jumping, stairs, kneeling

Swelling or visible prominence may develop over the inferior patellar pole

Often bilateral — though may be asymmetric in severity

⚠️ Exclude patellar sleeve fracture — acute severe injury in the same age group. Features: sudden onset with complete extension loss, marked swelling, significant mechanism. XR mandatory if suspected — requires surgical management.

Imaging — When and Why

✅ Typical presentation in the right age group does not require imaging to make the diagnosis. Reserve investigations for diagnostic uncertainty or atypical presentations.

X-Ray — Selected Cases

If Required

Lateral knee X-ray

May show ossification or fragmentation at the inferior patellar pole. This is a developmental variant — it is not a fracture and should not be communicated as alarming to families. Exclude patellar sleeve fracture (large cartilaginous fragment with patella alta). Also indicated if extension mechanism is compromised.

Ultrasound — Atypical Cases

Optional

Inferior patellar pole and proximal patellar tendon

Identifies soft tissue oedema, cartilage irregularity, and proximal patellar tendon involvement. Avoids radiation exposure. Useful if diagnosis is uncertain or patellar tendon pathology needs to be excluded.

When to Image

Diagnostic uncertainty — atypical age, atypical location, bilateral and asymmetric
Acute traumatic mechanism — exclude patellar sleeve fracture
Loss of active extension — always image urgently
Failure to progress as expected after 6–8 weeks of appropriate management

Management — Conservative Only

✅ SLJ is always managed conservatively. Surgery is never indicated.

Core Interventions

Relative load modification — not complete cessation

Reduce provocative activities (jumping, sprinting, stairs) but maintain general fitness. Complete immobilisation is counterproductive and psychologically distressing for young athletes.

Quadriceps flexibility — the primary intervention

Tight quadriceps increase traction force at the patellar pole during activity. Daily quadriceps stretching is the single most important management step. Both supine and prone stretching techniques.

Hamstring flexibility

Reduces posterior chain tension and compensatory loading patterns through the knee extensor mechanism.

Patellar strap (Chopat strap) — symptom management during activity

Infrapatellar band disperses traction forces away from the inferior patellar pole. Not curative but enables continued sport participation with reduced pain.

Ice post-activity — 10–15 minutes

Simple analgesia: paracetamol or ibuprofen as needed

Family Education — Critical Component

This is a normal consequence of rapid bone growth — the tendon attachment site is temporarily vulnerable
It will resolve completely when growth plates close (typically 14–16 years)
X-ray fragmentation is a developmental finding — not a fracture — communicate this clearly to avoid unnecessary alarm
Activity participation is guided by pain tolerance — no evidence that continuing sport causes long-term harm
Pain ≤3/10 during activity is generally acceptable; pain >3–4/10 warrants load reduction

Return to Sport

Acceptable pain during sport

≤3/10

NRS — guide activity by this threshold

Natural resolution

Months–2yr

Until growth plate closure

Graduated Return

Guide by pain: NRS ≤3/10 during activity is acceptable; do not enforce complete rest on this basis alone
Reduce intensity and volume of jumping and sprinting during symptomatic flares
Patellar strap during sport for ongoing symptom management
Full return to all sport expected when the growth plate closes — this should be communicated as the prognosis
Maintain quadriceps and hamstring flexibility programme as a permanent habit during the growth period

💡 Message for Families"As your child's bones grow rapidly, the tendon pulls harder at the attachment point — this is why it hurts. As growth slows and the bone matures, the symptoms will completely disappear. We keep your child active and manage the pain — we do not bench them."

Adolescent Clavicle Fracture

Remodelling potential, conservative management and surgical decision-making

📚 KZN Sports Med Network · Oct 2025 · SAOJ Letter Submitted

Clinical Overview

💡 The remodelling potential in adolescent clavicle fractures is extraordinary. This fundamentally shifts the management algorithm — even significantly displaced fractures can be managed conservatively in the vast majority of cases.

Clinical Assessment

Mechanism: direct impact to shoulder — fall, tackle, contact sport

Deformity, swelling and point tenderness over clavicle

Neurovascular assessment — mandatory

Brachial plexus sensation and motor function. Subclavian vessel integrity. Skin tenting = risk of open fracture or impending skin compromise.

Exclude pneumothorax after high-energy mechanism

Auscultate bilateral lung fields. Refer urgently if respiratory compromise.

Fracture Location — Classification

Location	Frequency	Key Consideration
Middle third	~80%	Highest remodelling potential — most managed conservatively
Lateral third	~15%	May involve physis — distinguish physeal injury from ligamentous injury at AC joint
Medial third	~5%	Rare — assess sternoclavicular joint carefully; exclude posterior SC dislocation (vascular emergency)

Imaging

X-Ray — Standard First Line

Standard

AP clavicle + 15° cephalad view

AP view alone may underestimate superior displacement and shortening. The 15° cephalad tilt view better demonstrates true displacement. Document: fracture pattern, displacement in mm, shortening, angulation, and integrity of the cortical edges.

Key Measure

Shortening — context-dependent in adolescents

In adults, >15–20mm shortening is a relative surgical indication. In adolescents, shortening alone is not a surgical indication given the extraordinary remodelling capacity. Document for serial comparison.

CT — Selected Indications

Medial Third

CT chest — sternoclavicular joint assessment

Posterior SC dislocation can compress the trachea, oesophagus or great vessels — this is a surgical emergency and plain XR may underappreciate it. CT provides definitive characterisation. Also use CT if epiphyseal involvement is uncertain on XR for lateral third fractures.

Management

Conservative — First Line for Most Adolescent Fractures

✅ Conservative management is the preferred approach in adolescents. The remodelling capacity at this age is exceptional — significantly displaced fractures routinely achieve acceptable functional and cosmetic outcomes without surgery.

Broad arm sling × 2–4 weeks for comfort (not rigid immobilisation)
Simple analgesia: paracetamol ± ibuprofen
Pendulum exercises from week 1–2
Progressive ROM and periscapular strengthening from week 3–4
Radiological union: 6–8 weeks in adolescents (significantly faster than adults)
Serial XR at 2–3 weeks and 6 weeks to confirm consolidation

Surgical Indications — Very Limited in Adolescents

Open fracture or skin at risk of breakdown

Neurovascular compromise not resolving

Posterior sternoclavicular dislocation threatening vascular structures

Symptomatic non-union after 3 months — rare in adolescents

⚠️ Plate fixation in adolescents carries a ~30% refracture rate around the plate — significantly higher than in adults. This must be discussed explicitly if surgery is considered. The implant creates a stress riser through the most active years of the athlete's life.

📝 Knowledge gap noted in group discussion: Scapular dyskinesia rates following adolescent clavicle fracture are not well established in the literature. A letter was submitted to the SAOJ exploring this gap.

Return to Sport

Non-Contact Sport

6–8wk

Radiological union confirmed on XR

Contact Sport

10–12wk

Full consolidation + strength recovery

RTP Criteria

Radiological union confirmed — XR at 6–8 weeks

Full pain-free shoulder ROM — abduction and forward flexion

Shoulder girdle strength symmetrical — particularly scapular stabilisers

Contact sport: protective padding + coach/parent informed consent

💡 Scapular Assessment at RTPGiven the uncertainty around scapular dyskinesia rates post-clavicle fracture in adolescents, a brief scapular assessment at the RTP consultation is reasonable — observe scapular control during shoulder flexion and abduction before clearing for overhead or contact sport.

Evidence-BasedClinical Guidelines

Evidence-Based
Clinical Guidelines