Fitness requires a certain amount of protein. The purpose of fitness is to reduce fat. The bust you said is getting smaller. If you are a girl, your cup is still the same or even bigger. If you are a boy, isn't that the purpose of fitness? I suggest that you let your body absorb protein within half an hour after exercising, but it is not easy to take in too much. Things containing protein can be searched by Baidu. If not, it will actually be harmful to your health in the long run.