You did that push-up, and it didn't work well. If you increase your muscles like fitness. Take a heavy object. It's heavy. You can exercise with it, that is, the kind of heavy objects that you limit to no more than five times, or do push-ups with heavy objects on your back. When you do it, you must fully stretch your muscles and breathe evenly. Don't hold your breath. Every time I come back from work, I will do two groups, five times each. The absolute effect will be obvious. This can increase your absolute strength and thicken muscle fibers.