Question

question 19 (1 point)
listen
which muscles extends the arm while doing push - ups?
triceps brachii
deltoid
pectoralis major
biceps brachii

Explanation:

The triceps brachii is responsible for extending the elbow joint, which is a key action in the upward phase of a push - up. The deltoid mainly functions in shoulder abduction, flexion, and extension. The pectoralis major is involved in horizontal adduction of the shoulder (bringing the arms together across the chest). The biceps brachii is a flexor of the elbow joint.

Answer:

Triceps brachii