Chest
chest
a concentric muscle action.
if you mean bench press, then that is deltoids, triceps, and pectorals (or chest)
The bench press is a compound exercise that builds several muscle groups. Bench press works primarily to build the chest (pectoralis major) but also builds the anterior deltoids, serratus anterior, coracobrachialis, and the triceps.
The pectoralis major is the muscle that is used when controlling the bar going down during a bench press.
biceps brachii
That is the negative portion of a movement. Lowering the weight during a bench press
The bench press has two phases: eccentric and concentric. The first phase, as you lower weight toward your chest, is called the eccentric, or muscle-lengthening motion. The second phase, as you raise the weight back up, is called the concentric, or muscle-shortening phase. It is during the concentric phase that you can feel your chest getting tight. Learning which muscles are used during the concentric phase of the bench press is beneficial for focusing your mind on the correct area and therefore improving your exercise technique.The primary concentric mover of the bench press is the pectoralis major, which you may better know as the chest. Depending on which version of the bench press you are doing, you will be recruiting a specific part of the muscle group. The regular bench press on a flat surface mainly works your middle pecs. The incline and decline versions mainly work your upper and lower pecs, respectively.
A bench press without the use of a bench press shirt.
The popular Bench Press method works, the Pectoral (Pecks) Muscles (Bottom and top), as well as the Shoulder and the third Triceps Muscle.
This bench is not designed for the bench press there is no bar to ssuppot the weights for bench press.
The bench press primarily exercises the pectoralis major, but also the anterior deltoids, serratus anterior, coracobrachialis, scapulae fixers, trapezii, and the triceps.
pecs triceps anterior delts