ITB syndrome is an overuse injury that usually presents as pain in the lateral aspect of the knee due to inflammation of a portion of the band, most commonly near the knee. It is most common in runners due to the repetitive knee flexion and extension (bending and straightening) of the knee required.
When the knee repetitively bends and straightens, the band slides of the lateral femoral condyle of the knee, causing excessive friction and thus inflaming the band, resulting in pain. It has been found that individuals diagnosed with ITB syndrome often have thickening of the band itself, which inflames the space between the ITB and femoral condyle.
A number of training factors have been suggested to be risk factors for ITB syndrome:
- Excessive running in the same direction on a track
- Increased running mileage
- Downhill running
- Wearing worn out shoes with improper support