Cross pelvic posture

The cross pelvic posture is defined by an increased lumbar lordosis and anterior tilt of the pelvis and is associated with tight hip flexor (iliopsoas and rectus femoris) and lumbar extensor (lumbar erector spinae) muscles, weak hip extensor (gluteus maximus) and lumbar flexor (rectus abdominus) muscles, and sacroiliac joint dysfunction. These musculoskeletal abnormalities place added stress on the hamstring muscles during activity.