Which description correctly describes shoulder extension strength testing?

Which description correctly describes shoulder extension strength testing?

• A. Extend the arm forward against resistance with stabilization of the shoulder girdle.
• B. Abduct the arm to the side against resistance at the distal arm.
• C. Move the arm posteriorly (extension) against resistance, with stabilization of the scapular region.
• D. Rotate the arm internally against resistance at the forearm.

Answer: (D)

Shoulder extension strength testing evaluates the ability to move the arm backward at the shoulder joint, isolating glenohumeral extension. To do this properly, you position the arm at the side with the elbow extended and stabilize the scapula so the effort comes from the shoulder itself rather than the back or shoulder blade. The examiner applies resistance to the posterior aspect of the upper arm as the patient tries to move the arm backward. This targets the posterior deltoid, latissimus dorsi, teres major, and possibly the long head of the triceps. Extending the arm forward would be flexion, abduction is a lifting away from the body, and internal rotation involves turning the arm inward rather than extending it.

Shoulder extension strength testing evaluates the ability to move the arm backward at the shoulder joint, isolating glenohumeral extension. To do this properly, you position the arm at the side with the elbow extended and stabilize the scapula so the effort comes from the shoulder itself rather than the back or shoulder blade. The examiner applies resistance to the posterior aspect of the upper arm as the patient tries to move the arm backward. This targets the posterior deltoid, latissimus dorsi, teres major, and possibly the long head of the triceps. Extending the arm forward would be flexion, abduction is a lifting away from the body, and internal rotation involves turning the arm inward rather than extending it.