ITB Syndrome

The iliotibial band (ITB) is a thick band of connective tissue that runs from the hip, down the outside of the thigh, to just below the knee. It plays an important role in stabilising the outside of the knee during walking and running. ITB syndrome develops when this tissue becomes irritated, typically from repetitive friction and compression against the outer part of the thigh bone as the knee bends and straightens — an overuse injury that’s particularly common in runners and cyclists, though it can affect anyone who suddenly increases repetitive lower-limb activity.

It’s one of the more frustrating running injuries because it can appear seemingly out of nowhere after a change in training, and tends to worsen the longer or further you run, often forcing a stop mid-session well before you’re otherwise fatigued.

What causes ITB syndrome

ITB syndrome is rarely just a problem with the band itself — the tissue is strong and doesn’t easily stretch or shorten, so the irritation usually comes from how the leg is loading during repetitive movement rather than from the ITB being inherently “tight.” The most common underlying driver is weakness through the hip and glutes, particularly the muscles that control how much the knee drifts inward and the pelvis drops during each stride. When these muscles aren’t controlling the leg well, the ITB experiences more friction and compressive load against the thigh bone with every step.

Training errors are usually the trigger that brings underlying weakness to the surface — a sudden increase in running volume, distance, or hill and downhill running, worn-out running shoes, or a rapid return to training after time off. Cyclists can develop ITB syndrome from an incorrectly positioned saddle or cleats altering how the leg tracks through each pedal stroke.

Symptoms

The hallmark symptom is a sharp, sometimes burning pain on the outside of the knee, usually appearing after a fairly consistent distance or time into a run and easing with rest. As the condition progresses without treatment, the pain tends to start earlier and earlier into activity, and can eventually become present even with everyday walking or stair use. Some people also notice tenderness directly over the outside of the knee, and a snapping or clicking sensation as the band moves over the bone.

When to see a physiotherapist

ITB syndrome generally responds well to physiotherapy assessment and a structured strengthening programme, and it’s worth being seen once pain starts limiting your running rather than waiting for it to resolve on its own, since the underlying hip weakness driving it won’t correct itself with rest alone. If knee pain is accompanied by significant swelling, a sense of the knee giving way, or pain that developed suddenly from a specific twisting injury rather than gradually with training, it’s worth a broader assessment to rule out other knee structures being involved, such as the meniscus or ligaments.

Physiotherapy treatment for ITB syndrome

Because ITB syndrome is driven by loading and strength patterns rather than by the band itself being the problem, treatment addresses both the immediate irritation and its underlying cause:

• Manual therapy and soft tissue work through the hip, outer thigh and surrounding muscles to reduce tension and ease the immediate irritation around the knee
• Exercise rehabilitation — a targeted hip and glute strengthening programme addressing the control and loading pattern that’s actually driving the friction against the knee
• Training load review to identify what change in volume, distance, terrain or footwear triggered the problem, and how to modify training in the short term while symptoms settle
• Running technique and cadence advice where relevant, since small adjustments to stride pattern can reduce compressive load through the ITB

What to expect from treatment

Many cases improve within four to six weeks of a targeted hip strengthening programme combined with appropriate training load management, though longstanding cases that have been present for months can take longer. Foam rolling and stretching can ease symptoms temporarily and have a place in the early stages, but they don’t address the underlying hip strength and loading pattern — Andrew’s programme is built around correcting that, since it’s what actually resolves the problem rather than just masking it session to session.

Preventing recurrence

Because ITB syndrome is fundamentally a strength and control issue that training load exposes, maintaining hip and glute strength once symptoms have resolved — alongside sensible progression of running volume and distance — is what keeps it from returning as training ramps back up.