ANATOMY

Detailed explanation-1: -The triceps serve as an antagonist, or opposing, muscle of the biceps. Typically, the triceps are the bigger of the upper arm muscles. The biceps and triceps are each unique in their makeup and function.

Detailed explanation-2: -During a biceps curl, the opposing muscle group-the antagonist-is the triceps.

Detailed explanation-3: -The biceps are two headed muscles located on the front of your upper arms. The biceps begin above your shoulder and end on your lower arm bone. When the elbow flexes, the biceps shorten or contract. The biceps are the antagonist of the triceps as this flexion is the direct opposite action of a triceps extension.

Detailed explanation-4: -Opposing or antagonist muscles are the muscles that do the opposite of the muscle that is working. For example, when a person performs a bicep curl, the elbow flexes as the bicep shortens. The opposing muscle group in this case is the triceps, which lengthen or elongate in order to allow this movement at the elbow.

Detailed explanation-5: -Biceps and triceps are called antagonistic muscles. Because during flexion at the elbow, biceps contract and triceps relaxes, during extension at an equivalent joint, triceps contract, and biceps relax.