Evaluates gluteus medius​

1. Begin with the patient standing in front of you in normal stance, observe PSIS dimples and pelvic height​
2. Ask patient to raise one leg and observe dimples/pelvis​
3. A drop in height on the side of the lifted leg indicates a positive test for a weak gluteus medius of the stance leg (opposite leg) since the muscle is not strong enough to support the pelvis when the opposite leg is lifted.