If you are a boy, choose to do push-ups to build strong muscles. Choose push-ups not only because they are not limited by environment and conditions, but also because they can shape the muscles you want more efficiently. Push-ups don't need much professional environment and equipment. A bed is enough, or you can do it on the floor if you are too lazy to sleep. You can land on all fours, support your body, then climb down and repeat this action. As long as you complete the specified amount within the specified time every day, or take out 20 minutes to complete the exercise every day for one month, you will see remarkable results. Stick to it and you will see the ideal effect you want to achieve. Push-ups can not only exercise chest muscles, but also abdominal muscles.