If you are not full, you can drink a bottle of milk or soup. Lei 3, commonly known as "9 days thin", can be tried if conditions permit, and it is better to cooperate with the sports meeting.
If you exercise, you don't have much time to exercise when you study at ordinary times, that is, when you exercise collectively at school, you should try your best to exercise in physical education class, during recess and so on.
If you are free at night, you can go out for a walk for 30 minutes. That's about it. That's how I lose weight now.