During anti-gravity hip abduction testing, where is stabilization applied?

During anti-gravity hip abduction testing, where is stabilization applied?

• A. Stabilization at the pelvis.
• B. Stabilization at the distal thigh just proximal to the knee.
• C. Stabilization at the ankle.
• D. Stabilization at the opposite hip.

Answer: (B)

The main idea is to isolate the movement at the hip joint during hip abduction and prevent substitutions from other joints. Stabilizing the distal thigh just above the knee fixes the thigh segment so that the leg’s sideways movement comes from the hip rather than the knee or pelvis. This position helps ensure the test truly measures the strength of the hip abductors (gluteus medius/minimus) against gravity. Stabilizing the pelvis or ankle wouldn’t control the limb in the same way and could allow compensatory motions, while stabilizing the opposite hip wouldn’t prevent substitutions in the tested limb. So, securing the distal thigh near the knee is the best way to isolate the hip abduction during anti-gravity testing.

The main idea is to isolate the movement at the hip joint during hip abduction and prevent substitutions from other joints. Stabilizing the distal thigh just above the knee fixes the thigh segment so that the leg’s sideways movement comes from the hip rather than the knee or pelvis. This position helps ensure the test truly measures the strength of the hip abductors (gluteus medius/minimus) against gravity. Stabilizing the pelvis or ankle wouldn’t control the limb in the same way and could allow compensatory motions, while stabilizing the opposite hip wouldn’t prevent substitutions in the tested limb. So, securing the distal thigh near the knee is the best way to isolate the hip abduction during anti-gravity testing.