ACSM Personal Trainer Certification Practice Exam

Question: 1 / 400

Which movement does the subscapularis muscle primarily assist with?

Lateral rotation

Medial rotation

The subscapularis muscle primarily assists with medial rotation of the humerus at the shoulder joint. This muscle is located on the anterior surface of the scapula and is classified as one of the rotator cuff muscles. Its position allows it to exert a pulling force on the humerus, facilitating its inward rotation towards the body.

Medial rotation is a crucial function during various movements, including certain activities in sports, daily tasks, and rehabilitation exercises. For example, when performing internal rotation, such as in certain arm or shoulder exercises, the subscapularis plays a vital role in stabilizing the joint and producing the desired movement.

Understanding the specific role of the subscapularis in medial rotation is essential for personal trainers, particularly when developing training programs or rehabilitation strategies that aim to improve shoulder function or address injuries.

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Abduction

Adduction

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