Tensor Fasciae Latae
Hip & Pelvis
The muscle that feeds into the IT band — runners know it well when it gets tight.
Function
Flexes, abducts, and medially rotates hip; stabilizes knee via IT band
Origin
Anterior superior iliac spine (ASIS) and anterior iliac crest
Insertion
Iliotibial tract (IT band)
Innervation
Superior gluteal nerve (L4-S1)