Yes, it is sit-ups! However, it should be noted that you are still young. If you exercise too much, it will have a great influence on your physical development. Be careful! No more than fifty a day, it is best to do it before going to bed. It is good for sleep after exercise. After every exercise, you should pat your abdomen to relax your muscles, and then twist your waist back and forth to lose weight. Come on!

Abdominal pain is excessive or effective. You can take a day off and relax your abdomen for a day.