If you are a runner who has been stopped in your tracks by a sharp, burning pain on the outside of your knee – usually appearing between 5km and 10km into a run – there is a good chance IT band syndrome is the cause.
IT band syndrome (ITBS) is one of the most common overuse injuries in runners and cyclists. It is also one of the most misunderstood. Despite being called an IT band problem, the band itself is not the real issue – which is exactly why foam rolling it relentlessly rarely fixes anything long-term.
What Is the IT Band?
The iliotibial (IT) band is a thick strip of connective tissue that runs from the hip (ilium) down the outside of the thigh and attaches just below the knee. It plays a key role in stabilising the knee during repetitive loading activities like running and cycling.
Unlike a muscle, the IT band cannot be directly stretched or significantly lengthened. However, the muscles that feed into it – primarily the glutes and tensor fasciae latae (TFL) – can be strengthened and retrained. That is where the real solution lies.
What Is Actually Causing the Pain?
The outer knee pain of ITBS was long attributed to the IT band rubbing back and forth over a bony prominence on the femur. Current understanding points to compression of a highly innervated fat pad between the IT band and the lateral femoral epicondyle. When the IT band becomes excessively tensioned, it compresses this structure – causing the characteristic burning pain.
Hip abductor weakness, particularly the glute medius, leading to increased hip adduction and internal rotation during running is the most consistent driver of this problem. Other contributing factors:
- Rapid increases in running volume – the classic “too much too soon” pattern
- Downhill running, where the knee spends more time in the compression zone around 30 degrees of flexion
- Cambered road running (constantly running on a slope)
- A longer stride length or lower cadence, increasing time in the problematic range
Recognising IT Band Syndrome
- Sharp, burning pain on the outer knee (lateral femoral epicondyle area)
- Pain appears at a predictable point in a run and worsens the further you go
- Settles relatively quickly with rest but returns on the next run at the same point
- Pain on the outside of the knee when going down stairs or after sitting for long periods
- May radiate up the outer thigh or down into the upper shin
ITBS is less likely if the pain is on the inner knee, directly behind the kneecap, or is associated with swelling inside the joint.
How a Biokineticist Approaches ITBS
The standard “stretch your IT band and rest” advice has a high recurrence rate because it does not address the mechanics driving the compression. A biokinetics assessment looks at the full picture.
Movement Analysis
How you run, squat, and land. Looking specifically for excessive hip adduction or internal rotation during single-leg loading, which directly increases the tension through the IT band.
Hip Strength Assessment
Glute medius weakness is the most consistent finding in runners with ITBS. Side-lying hip abduction, clamshells, and single-leg loading tests reveal exactly where the weakness is and guide the exercise prescription.
Programme Design
A structured programme starts with glute activation and hip strengthening before gradually reintroducing running. See the guide to best knee strengthening exercises for examples of the movements commonly used in this phase.
What the Rehabilitation Looks Like
Phase 1 (1–2 weeks): Reduce irritation
Avoid the distance at which pain appears. Use ice after activity. Foam roll the quad, glute, and TFL – but avoid pressing directly on the lateral knee. Begin glute activation exercises.
Phase 2 (2–6 weeks): Build strength and control
Clamshells with a band, lateral step-ups, side-lying hip abduction, single-leg squats with a focus on hip control, single-leg Romanian deadlifts. The goal is to build genuine hip strength that holds up under fatigue.
Phase 3 (4–8 weeks): Return to running
Gradual reintroduction of running with technique cues (shorter stride, higher cadence, conscious hip control). Increase weekly distance by no more than 10% per week and monitor the response.
Preventing Recurrence
ITBS tends to come back when the root cause is not fully addressed. Long-term prevention involves maintaining hip abductor strength year-round, managing training load increases carefully, and getting a movement assessment if you are building toward a race.
Related reading: Can Weak Glutes Cause Knee Pain? | Best Exercises to Strengthen Your Knees
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Related reading: Patellofemoral Pain Syndrome: A Biokinetics Approach | Can Weak Glutes Cause Knee Pain? | Best Exercises to Strengthen Your Knees