in the downward phase (eccentric phase) the biceps, pecs and abs are the agonist muscles and the triceps, lats and spinal erectors are the antagonist. In the upward phase (concentric phase) they are reversed. The triceps, lats and spinal erectors are the agonists and the biceps, pecs & abs are the antagonists.
Your deltoids are your stablisers
Primary anatagonist muscle in a push up is biceps humeri, other is for example trapezius!
triceps
antagonist muscle
A antagonist muscle is a muscle that opposes the action of another muscle. The Triceps Brachii is the antagonist of the Biceps Brachii.
antagonist
Your pectoral muscle allows you to do a push up. When you do a push up you use your pectoral muscle, your tricep muscle, and you use your shoulder back at the rotator cuff.
The antagonist muscle group for a pull up is the pectoralis major, which is primarily responsible for shoulder adduction and internal rotation. In addition, the biceps brachii serves as a synergist muscle during the movement.
The antagonist is your mom
A antagonist muscle is a muscle that opposes the action of another muscle. The Triceps Brachii is the antagonist of the Biceps Brachii.
The agonist (not angonist) muscle are the Biceps Brachii and the Brachioradialis and the antagonist is the Triceps Brachii.
In push up you use your triceps muscle and serratus anterior muscle. It is such a powerful muscle that you can say that you push the earth away form your body. (Thanks to the great scientist Einstein, for his theory of relativity.)
The triceps brachii is the antagonist to the biceps brachii.
the bicep
Platysma muscle