If it is on campus, boys can invite their classmates to play basketball or do some other group sports in the evening.
Playing basketball can not only make your figure better, but also help boys grow bones. Boys who often play basketball are taller than boys who don't exercise regularly.
If you don't want so many people together, you can do an hour of morning exercises in the morning or go running at night for half an hour to an hour every day.
Regular running can not only speed up the body's metabolism and slow down muscle relaxation, but also help sleep and keep fit.