Iliotibial Band Syndrome
ITBS is an overuse injury where repetitive flexion and extension causes inflammation of the iliotibial band when it rubs over the lateral femoral condyle.
Marked by a sharp, burning, knee or hip pain, ITBS is a very common running injury among marathoners. Indeed, it’s responsible for as many as 80% of all overuse pains on marathon day. The ITB is a ligament that runs along the outside of the thigh — from the top of the hip to the outside of the knee. It stabilizes the knee and hip during running, but when it thickens and rubs over the bone, the area can become inflamed or the band itself may become irritated — causing pain.