What is the action of the trapezius muscle in the lifting phase of a standing dumbbell lateral raise?

Question

Quizplus · Accepted Answer

The trapezius muscle is responsible for upward rotation of the scapula during the raising phase of the lateral raise. This is a concentric contraction, as the muscle is shortening to lift the weight. Choice A refers to abduction of the humerus away from the midline of the body, which is a movement primarily performed by the deltoid muscle. Choice B refers to elevation of the scapula, which occurs during the first phase of a pull-up or lat pull-down exercise. Choice C refers to adduction of the humerus, which is a movement toward the midline of the body and is not involved in the lateral raise.

What Is the Action of the Trapezius Muscle in the Lifting