Gluteus Maximus Iliotibial Slip

tendo partis superficialis musculi glutei maximi in tractum iliotibialem

The superficial portion of the gluteus maximus, approximately the upper three-quarters of the muscle, does not insert on bone but instead inserts into the iliotibial band (ITB) via a broad, flat tendinous slip. This slip blends with the tensor fasciae latae insertion into the ITB, collectively providing tension to the lateral thigh fascia from above. The deep portion of gluteus maximus inserts on the gluteal tuberosity of the femur. The iliotibial slip transmits gluteus maximus force to the lateral knee extensor mechanism and contributes to ITB tension during hip extension.

Region: Thigh

Clinical Relevance

Clinical Notes

The gluteus maximus iliotibial slip is the upper driver of ITB tension, explaining why gluteus maximus weakness and altered firing patterns in runners contribute to iliotibial band syndrome at the lateral knee. Rehabilitation for IT band syndrome therefore targets gluteus maximus strengthening alongside hip abductor training, not just stretching the band itself. The slip is also relevant in ITB release procedures, where proximally the band must be traced to its muscular origins to assess the contribution of this slip to pathological ITB tightness.

Pathology

Common Injuries & Conditions

IT Band Syndrome from Gluteus Maximus Dysfunction

Weakness or delayed activation of the gluteus maximus iliotibial slip reduces lateral hip stability and alters femoral alignment during running, increasing lateral knee compression and ITB friction over the lateral femoral epicondyle, contributing to runner knee pain managed with hip extension strengthening.