Push-ups must be done. Then do arm flexion and extension on the school parallel bars.
Do it every morning or evening. Take a day off.
Jogging to warm up first. Then do four or six groups of arm flexion and extension, each group is 8- 12.
Go back to the dormitory and do two sets of push-ups to the limit ... it will be effective after three months. Hehe'
Swimming is one of the best aerobic exercises. Only by swimming correctly and scientifically can we achieve the effect of keeping