I happen to be engaged in sports. Long-distance running is to exercise your endurance and increase your slow muscle fibers, while sprint is to exercise your explosive power and increase your fast muscle fibers, and it is mainly anaerobic breathing. So I think, if you want to make your beer belly smaller, you'd better insist on doing sit-ups, which is more effective. There is no requirement for your opponent. When you do it, you should keep pace with your breathing, inhale and exhale, and take your time when you get down to keep your muscles tense. It is best to have 10- 15 (standard) in each group, three groups at a time, and relax prevention after finishing.

Also, you can swing from side to side, which is also a good idea. I hope you can stick to it … lose your beer belly as soon as possible!