Iliotibial band

The iliotibial band is a thick strip of connective tissue that runs along the outer side of the thigh from the hip down to just below the knee, transmitting force and helping stabilize the leg during movement.

What your iliotibial band (IT band) does and where it causes trouble

Your IT band — the iliotibial band — isn't a muscle; it can't contract or relax on its own. It's a long, dense length of fascia connecting the hip muscles above to the tibia below, and it plays a stabilizing role at both the hip and the outer knee. During repetitive activities like running and cycling, the iliotibial band passes repeatedly over a bony prominence on the outer side of the knee called the lateral femoral epicondyle. When the band is under excessive tension — from hip weakness, training load, or biomechanical factors — that repeated contact becomes a source of friction and irritation. The result is a sharp or burning pain on the outside of the knee that tends to come on at a predictable point during activity, ease with rest, and return at the same threshold every time.

Why iliotibial band pain keeps coming back

Foam rolling and stretching the iliotibial band address short-term soreness but not the underlying cause. The band becomes overloaded when the hip muscles — particularly the gluteus medius — aren't doing enough work to control leg alignment during movement. Without addressing that weakness, the same pattern continues and the pain returns.

Why the iliotibial band can't be stretched out of the problem

The iliotibial band is too dense and stiff to meaningfully lengthen through stretching. What reduces load on it is improving hip strength and movement mechanics — changes that require targeted rehabilitation, not passive tissue work. A physical therapist can identify exactly which factors are driving your symptoms and address them directly.

How Sword Health can help

A physical therapist can assess the hip strength and gait mechanics behind your iliotibial band pain and build a plan to address them. Sword makes that care available from home, so you can work on the root cause rather than managing symptoms that keep coming back.