What does the Lift Off / Belly Press Test help to identify?

The Lift Off / Belly Press Test is a specific assessment used to evaluate the integrity and function of the subscapularis muscle, which is one of the four rotator cuff muscles located in the shoulder. This muscular test is performed to determine whether there is a lesion or significant dysfunction in the subscapularis.

During the Lift Off Test, a patient is instructed to place their hand behind their back and attempt to lift their hand away from their back. A positive result, typically indicated by the inability to perform the task or difficulty maintaining the lift, suggests that the subscapularis muscle may not be functioning properly due to a tear or other injury.

This test is crucial in identifying shoulder pathologies specifically related to the internal rotation and stabilization of the shoulder joint provided by the subscapularis. Thus, the test directly correlates with identifying a lesion of the subscapularis muscle, making it the correct answer.