a concentric muscle action.
Concentric
That is the negative portion of a movement. Lowering the weight during a bench press
Chest
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
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.
The bench press primarily exercises the pectoralis major, but also the anterior deltoids, serratus anterior, coracobrachialis, scapulae fixers, trapezii, and the triceps.
This bench is not designed for the bench press there is no bar to ssuppot the weights for bench press.
pecs triceps anterior delts