The tensor fasciae latae (TFL) muscle is a small muscle located in the upper thigh. It originates from the anterior superior iliac spine and the outer lip of the iliac crest of the pelvis, and inserts on the iliotibial band of the fascia lata. The primary function of the TFL is to assist in the flexion, abduction, and internal rotation of the hip joint. It is also involved in the lateral stabilization of the knee joint.

In terms of sports, the TFL is commonly used in activities that involve running and lateral movement.

It is not necessary to use the TFL muscle daily, as it will naturally be engaged during activities that involve movement of the hip and knee. However, incorporating specific exercises that target the TFL can help to improve muscle strength and function.