It's usually used when you push or lift an object. According to the movement of the arm, when you are exercising or working, you may use the biceps, the triceps, or both.
triceps
I think you are referring to the triceps. This is the muscle that attaches at the elbow and the shoulder. The one that you use when extending your arm. biceps; up triceps; under
triceps, root
Triceps is a singular and plural word, we can it for both plural and singular.
i just broke my triceps#
Triceps brachi
The triceps and biceps are antagonistic muscle groups; the triceps straighten the arm and the biceps pull it in the opposite way. Therefore, when the triceps contract, the biceps lengthen.
The bodybuilders triceps were very large.
Triceps brachii
"Triceps" is singular. "Tricep" is not officially a word, although it it widely used.
The triceps contract when the biceps relax.And, vice versa. The triceps relax when the biceps contract.
The triceps brachii is the muscle of the body primarily used to extend the elbow. It is a long muscle that originates in the scapula.