ACSM Personal Trainer Certification Practice Exam

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Prepare for the ACSM Personal Trainer Certification Exam with interactive quizzes and comprehensive study aids. This quiz experience enhances your understanding of fitness concepts, exam structure, and key information you need to succeed.

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What action does the pectoralis minor perform at the shoulder girdle?

Retraction
Abduction
Protraction
Adduction

The correct answer is: Protraction

The pectoralis minor plays a key role in the movement of the shoulder girdle. Its primary action is protraction, which involves the movement of the shoulder blade (scapula) forward along the rib cage. When the pectoralis minor contracts, it pulls the scapula away from the spine and toward the front of the body, aiding in activities that involve reaching forward or pushing movements. Protraction is particularly important in various functional movements, such as throwing, pushing, or reaching. Understanding this action helps recognize how the pectoralis minor contributes to overall shoulder stability and mobility. The other movements mentioned, such as retraction, abduction, and adduction, are associated with different muscle groups and actions. Retraction involves pulling the scapula towards the spine, abduction pertains to moving limbs away from the midline of the body, and adduction refers to moving limbs towards the midline. Therefore, the role of the pectoralis minor is distinctly aligned with the action of protraction at the shoulder girdle.