Iliotibial Band Syndrome

Patients report lateral knee pain localised precisely to the lateral femoral epicondyle - not the lateral joint line and not the lateral hip. The pattern is distance-dependent: pain begins after a predictable mileage, worsens as the run continues, may force a stop, settles with rest, and returns at the same point the next run. Downhill running and stair descent are particularly provocative because the knee dwells in the 20-30 degree impingement zone. There is no effusion, no locking, and no giving way - mechanical symptoms suggest intra-articular pathology instead.

Always ask about training history: mileage increase, new routes, cambered surfaces, hills, footwear changes, and (for cyclists) saddle height and cleat position.

Examination centres on point tenderness at the lateral femoral epicondyle with the knee flexed to about 30 degrees - the most important clinical finding. The Noble compression test, applying pressure over the epicondyle as the patient extends the knee from flexion, reproduces pain at around 30 degrees in a positive test. The Ober test probably reflects general lateral hip tissue compliance rather than ITB length specifically and should be read as a contributing-factor assessment, not a diagnostic test. Observe for dynamic valgus and contralateral pelvic drop on single-leg squat, and formally assess hip abductor strength side-lying.

Key differentials: lateral meniscal tear (joint-line tenderness, mechanical symptoms), lateral compartment OA, LCL injury (varus mechanism), distal biceps femoris or popliteus tendinopathy (posterolateral pain), GTPS (lateral hip), and common peroneal nerve entrapment at the fibular head (neurology).

ITBS is a clinical diagnosis and imaging is not routinely required. Plain radiographs are reserved for suspected osteoarthritis, fracture, or other bony pathology. MRI is indicated when the diagnosis is unclear or symptoms are refractory - in practice more useful for excluding alternative pathology than for positively confirming ITBS. Ultrasound can demonstrate ITB thickening and peri-epicondylar fluid and may be used to guide corticosteroid injection in recalcitrant cases. Bloods are not indicated unless inflammatory arthritis is suspected.

Management is conservative.

Education is the foundation: explain the load-related mechanism and identify the training error - the most common precipitant. Reduce running volume, particularly downhill mileage, cambered surfaces, and long slow distance. Maintain fitness with non-provocative cross-training (swimming, aqua jogging, elliptical). For cyclists, review bike fit, saddle height, cleat position, and gear/cadence.

Physiotherapy-led rehabilitation is the cornerstone, with hip abductor and gluteal strengthening at its core: clamshells with resistance, side-lying abduction, standing band abduction, hip hitch, single-leg bridge, and single-leg squat progression. Add quadriceps, hamstring, and trunk-control work. The ITB is mechanically stiff and unlikely to be meaningfully lengthened by stretching or foam rolling; any benefit is symptomatic rather than structural.

Running retraining is individualised. A 5-10% cadence increase shortens stride and reduces time in the impingement zone for some runners. Address crossover gait where present.

Oral NSAIDs may help short-term symptom control. Ultrasound-guided corticosteroid injection into the ITB-epicondyle space may provide short-term relief in recalcitrant cases but should not be used as standalone treatment. Refer if symptoms persist beyond 3-6 months of structured rehabilitation. Surgical options (ITB release, fat pad excision) are rarely needed.

Phase 1 (0-2 weeks, pain-dominant): load modification with reduced or temporary cessation of running. Ice after provocative activity, oral NSAIDs as needed, non-provocative cross-training. Begin gluteal activation in non-provocative positions - side-lying hip abduction, clamshells, isometric gluteal sets.

Phase 2 (2-6 weeks, strengthening): progressive hip abductor and external rotator loading - side-lying abduction with resistance, lateral band walks, hip hitch, single-leg bridge, hip thrust. Add quadriceps and hamstring work with trunk and pelvic control. Begin a graduated return to running - flat, easy pace, short distance, at a modestly higher cadence if appropriate - avoiding downhill and cambered surfaces initially.

Phase 3 (6+ weeks, return to running): build distance before speed, reintroduce uphill before downhill, and address technique factors (crossover gait, over-striding, pelvic drop). Continue hip strengthening throughout.

Return to full training is criteria-based: pain-free running at target distance and pace, adequate hip abductor strength, and good single-leg control. Previous ITBS is the strongest predictor of recurrence - ongoing twice-weekly hip strengthening is essential as a long-term prevention strategy.

• •Fairclough et al. (2006) - Anatomical and biomechanical work proposing the compression model: the ITB does not slide freely but compresses an innervated fat pad against the lateral femoral epicondyle at 20-30 degrees of knee flexion.
• •Noble (1980) - Original description of the Noble compression test, still used as a supportive clinical sign for ITBS.
• •Foch & Milner (2014) - Systematic review demonstrating altered hip kinematics (greater hip adduction and internal rotation) in runners with ITBS, supporting hip-focused rehabilitation.
• •van der Worp et al. (2012) - Systematic review of risk factors confirming training error and hip abductor weakness as the dominant modifiable contributors.
• •NICE CKS: Knee pain assessment - Recommends clinical assessment for runners with lateral knee pain, with imaging reserved for cases where alternative pathology is suspected.

• •ITBS pain is at the lateral femoral epicondyle - not the lateral joint line (meniscus, lateral OA) and not the lateral hip (GTPS). The exact location is the key discriminator.
• •The impingement zone is 20-30 degrees of knee flexion; downhill running and stair descent are worst because the knee dwells in this zone.
• •Modern biomechanical evidence favours compression of an innervated fat pad over the older friction model; the Kaplan fibres tether the ITB so it does not slide freely.
• •The Ober test reflects general lateral hip tissue compliance rather than ITB length specifically - a contributing-factor assessment, not a diagnostic test.
• •Hip abductor weakness driving dynamic valgus is the most common modifiable contributor, and structured hip strengthening is the cornerstone of management.
• •Effusion, mechanical symptoms, or joint-line tenderness should redirect you toward intra-articular pathology, not ITBS.