Shoulder flexion strength testing involves which action?

Shoulder flexion strength testing involves which action?

• A. Elevate the arm in flexion against resistance, while stabilizing the shoulder girdle to prevent compensations.
• B. Extend the arm behind the body with resistance at the elbow.
• C. Rotate the arm externally against resistance at the forearm.
• D. Abduct the arm to the side with resistance at the distal arm.

Answer: (A)

Shoulder flexion strength testing measures the ability to lift the arm forward in the sagittal plane against resistance, while the clinician stabilizes the shoulder girdle to prevent compensations. This isolation is key because lifting the arm forward engages the anterior deltoid (and parts of the pectoralis major) and can be masked by unwanted movements if the scapula or trunk are not held steady. By stabilizing the shoulder girdle, you prevent substitutions like shrugging, lateral trunk movement, or other motions that could falsely improve or hinder the perceived strength. The other motions described test different actions: extending the arm behind the body targets shoulder extension; rotating the arm externally targets external rotation; abducting the arm to the side tests abduction (middle deltoid and supraspinatus).

Shoulder flexion strength testing measures the ability to lift the arm forward in the sagittal plane against resistance, while the clinician stabilizes the shoulder girdle to prevent compensations. This isolation is key because lifting the arm forward engages the anterior deltoid (and parts of the pectoralis major) and can be masked by unwanted movements if the scapula or trunk are not held steady. By stabilizing the shoulder girdle, you prevent substitutions like shrugging, lateral trunk movement, or other motions that could falsely improve or hinder the perceived strength.

The other motions described test different actions: extending the arm behind the body targets shoulder extension; rotating the arm externally targets external rotation; abducting the arm to the side tests abduction (middle deltoid and supraspinatus).