To perform the pelvic drop exercise, stand with the foot of the affected leg on a stair, ledge, or other raised surface; the unaffected leg faces away from stair and remains non-weight-bearing throughout exercise. Begin with the unaffected hip elevated (pelvis tilted "unaffected side up"). Slowly lower the unaffected hip until the pelvis is tilted "unaffected side down." Then slowly raise the unaffected hip back to the starting position. Photograph A above shows the starting position and B the end position.