Push-ups are a good exercise. You can exercise pectoralis major, deltoid and triceps with different effects. If it is chest training, the correct way is that the distance between your hands is slightly wider than your shoulders. When propping up, you should rely on the strength of your pectoral muscles, feel the contraction of your pectoral muscles at the apex, and concentrate your thoughts on the pectoralis major. This is very important. It's no use if you are distracted. Hands are narrower than shoulders, and you can practice triceps. When you do it, your waist and abdomen should be flat, and you can also get training.