I'll tell you something about exercise to lose weight. Thin belly had better not lose weight in this way, because if you do a few sit-ups, you can't burn fat. If you do too much, the abdominal muscles will enter anaerobic breathing exercise and become hard muscle blocks. Once they rebound, they will become hard fat blocks, which is difficult to lose.

There is also a question about the rebound. Your question shows that you have misunderstood. People's life is in exercise, metabolism is always going on, and more energy is consumed, so the excess energy will be converted into fat and some glycogen to be stored. Therefore, after any successful weight loss method, if you don't pay attention to maintenance, it will rebound. There is no once-and-for-all weight loss method, but different weight loss methods have different rebound degrees in the later stage. The key is to develop good living habits and eating rules, pay more attention to health at ordinary times, do moderate aerobic exercise while ensuring a healthy diet, and stick to it, and you will have a good figure.