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Iliotibial band (ITB) function

The illustrations above demonstrate how the function of the iliotibial band (ITB) depends on the position of the knee:
(A) With the knee in full extension, the ITB acts as an active knee extensor.
(B) At 20° to 30° of knee flexion, the ITB becomes an active knee flexor.

From: Strauss EJ, Kim S, Calcei JG, Park D. Iliotibial band syndrome: Evaluation and management. J Am Acad Orthop Surg 2011; 19:728. Reproduced with permission from Lippincott Williams & Wilkins. Copyright © 2011 American Academy of Orthopaedic Surgeons. Unauthorized reproduction of this material is prohibited.

Graphic 91577 Version 5.0