2. Yes, it is divided into three parts, but they are on a whole muscle.

3. The lower chest is simple-push-ups, barbells are pushed down on the inclined board, and they have a certain ability to bend and stretch the parallel bars.

Flat bench press (barbell)+dumbbell bird+middle chest clip.

Push your chest with an upper ramp, bird.

4. 1, the above contents should be carried out with great weight according to the age.

2. Don't hold your breath, breathe in an orderly manner with the action, such as bench press: inhale when the barbell is not lifted, pause at the top, and experience the compression of muscles and the pumping feeling of blood flow.

5. I wish you success in bodybuilding.