Muscle exercise method: 1, arm muscle exercise, you can do 4 groups by lifting dumbbells with both hands, each group does 10. 2, abdominal muscle exercise, you can do abdominal rolling exercises, do 5 groups, each group does 30. 3, chest muscle exercise, you can do push-ups, do 3~4 groups, each group does 10~ 15. 4, leg muscle exercise, you can do squats, do 3~4 groups, each group does 10. For the above training, all groups need to rest 1~2 minutes. You can also run, play ball, play football, swim and so on. Carry out a comprehensive exercise of the whole body muscles.