Hip and pelvis injuries represent 2-5% of all sports injuries. Among these injuries, groin pain is the most common finding. The most common sports-related injuries in the hip, pelvis, and thigh area are musculotendinous, (eg, quadriceps strain, adductor tendinitis) and, less commonly, iliopsoas tendinitis. Iliopsoas tendinitis and iliopsoas bursitis are closely interrelated because inflammation of one inevitably causes inflammation of the other, due to their close proximity. Therefore, these 2 conditions are essentially identical in terms of presentation and management.
In basic terms, iliopsoas tendonitis is an inflammation of the tendon or area surrounding the tendon. Major causes of iliopsoas tendinitis are acute trauma and overuse resulting from repetitive hip flexion. See the image below.