Iliotibial Band Syndrome (ITBS)
Outside Knee Pain (Runner's Knee)
Lateral knee pain caused by the ITB at the lateral femoral epicondyle: the most common cause of lateral knee pain in runners. Previously thought to be a "friction syndrome" (ITB rubbing back and forth), now understood as a COMPRESSION injury (ITB compresses highly innervated fat pad/bursa against the epicondyle at ~30° knee flexion: the "impingement zone").
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