Illiotibial Band Friction Syndrome (ITBS)

ITBFS, or illiotibial band friction syndrome, is a common running injury. The iliotibial band is a long tendon that runs from the outside of the thigh to the side of the knee. It helps to stabilize the knee during walking and running. The iliotibial band (ITB) rubs against the prominent bone on the outside of the femur (thigh bone) at the knee with repeated bending and straightening.

Causes and Risk Factors

In most cases, ITBFS is caused by a history of ‘overuse,’ rather than direct trauma, such as a fall or tackles in sports. A rapid increase in training, excessive downhill running, or running on uneven surfaces can all predispose some athletes to developing ITBFS because of the additional stress placed on the ITB.