The tensor fascia lata (TFL) is a problematic muscle for many clients. In many cases, it is synergistically dominant over the gluteus medius and often contributes to tightness associated with the IT band. Its actions are primarily hip flexion and abduction, and it tends to be tight in many runners and athletes I see. Performing targeted soft tissue mobilization can help resolve myofascial tightness as well as promote better activation and preferential recruitment of the gluteus medius.