Which muscle is antagonistic to the biceps?
During a biceps curl, the opposing muscle group—the antagonist—is the triceps. Which muscles are antagonistic? In an antagonistic muscle pair, as one muscle contracts, the other muscle relaxes or lengthens. The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist.…Antagonistic muscle pairs. Biceps Triceps …