Tensor Fascia Lata
The Tensor Fascia Lata is short and strap-like. It passes downward and slightly backward to insert into the anterior part of the iliotibial tract. It is enclosed within the fascia lata, which splits to go upon both sides of it. Acting through the iliotibial tract, the tensor fascia lata extends the knee with lateral rotation of the leg; it may also assist in abduction and medial rotation of the thigh, but its role as an abductor has been contested.
To produce flexion of the leg at the hip joint, the tensor fascia lata acts with the iliopsoas. It definitely tenses the fascia lata and iliotibial tract to provide support to the femur on the tibia when standing.
When runners train extensively
on a downhill terrain, a problem results from a constant need to control the
bent knee. The lateral compartment muscles of the thigh are continuously attempting
to stabilize the knee from buckling laterally. The iliotibial tract responds
to tightening because the lower extremity demonstrates a limited ability to
properly attenuate the shock while the athlete is running downhill. Many athletes
do not stretch this area of their thighs before or after running (iliotibial
tract irritation).iliotibial tract. It is innervated by the superior gluteal
nerve (L2-L3) and acts to flex the thigh.