First, find out the reason for the big belly, whether it is a beer belly or insufficient exercise. If it is caused by drinking beer, it is recommended to drink less beer and do more push-ups and sit-ups in the future. If it is caused by lack of exercise, you definitely need to exercise, and you should eat less greasy things at dinner, eat six or seven minutes full at dinner, and stand for at least half an hour after each meal. I hope I can help you.