There are only a few kinds of instruments for practicing chest muscles, such as lying flat and pushing barbells, lying flat and flying birds, butterfly chests and tensioners. The first three can only be practiced in the gym, so you don't have time to go. Then use a stretcher, which is generally better, about fifty or sixty yuan. It can help you practice your chest and shape your outline, but you can't practice rough. If you have a little chest muscle, you can only practice your chest on a stretcher. Generally, each group has 12. As for how many groups to practice, you should exert force on your chest until it hurts.

Running more in the morning or at night can stretch the muscles in the chest ~

The school has parallel bars, right? It is also a good way to bend and stretch the arms of parallel bars up and down to the back and chest, but this action is very difficult, much more difficult than push-ups!

I can only say so much about your premise ~