Internal Rotation Resisted Strength Test is categorized as which type of test?

• A. Labral test
• B. Instability test
• C. Acromioclavicular test
• D. Impingement test

Answer: (D)

The internal rotation resisted strength test is used to assess impingement in the shoulder. When you apply resistance to internal rotation, you load the subscapularis and the rotator cuff in a way that compresses the subacromial structures under the acromion. If impingement or rotator cuff tendinopathy is present, this maneuver typically reproduces pain in the lateral shoulder or deltoid region, indicating a subacromial impingement process rather than a labral tear, instability, or AC joint issue. Labral tests tend to provoke deep joint or labral-focused pain and clicking, instability tests provoke apprehension or laxity, and AC joint tests target pain at the AC joint with movements crossing the chest; none of these closely mimic the subacromial compression pattern elicited by resisted internal rotation, which is why this test is categorized as an impingement test.