Exercises for tightening the chest muscles vary, but some of the most important are the bench press, the dumbbell fly, the cable crossover and the old-fashioned push-up. The push-up is the most basic exercise for tightening the chest muscles.
Push-ups can be done in the comfort of your own home or in the gym, and they work by simply forcing the chest muscles to raise the body up off the floor. Another exercise that does not require weights is the forward-leaning dip. The chest muscles work to move the upper arms, so it is very important to develop them in order to have a strong upper body.