Going to the school gym can exercise a good figure, but if you want to really enhance your physique. . . I suggest you spend half an hour to an hour exercising in the sports ground every day. Generally speaking, it includes running and leapfrog, which is of great help to improve your physical fitness. There are also general push-ups and sit-ups, which can shape the body step by step. I remember that once I exercised continuously for about 20 days, my physical fitness improved obviously. In fact, this is your insistence. I hope it works for you.