The Bodyweight Push-Up is a very basic and popular strength training exercise. The target muscle is the pectoralis major; the sternocostal head is dominant in this position. The muscles that assist in the movement are the anterior deltoid, triceps brachii and serratus anterior.
In this variation, body weight is supported on the fists, which requires greater stabilization of the wrist joint. But it also reduces the risk of injury to this joint. Sometimes, when the wrist is not strong enough, we may experience pain at the wrist joint. So what can we do about this?
Click on the link below to learn how to avoid or minimise pain at the wrist when doing your push ups.
Source : muscle&motion