A person's fitness is a three-level loneliness. There are many conditions for fitness. The most important thing is self-discipline. With self-discipline, you can stick to it. Fitness is a long process, and it needs to endure the pain that ordinary people can't bear. In addition, there are many temptations in life, and you also need to restrain yourself, such as playing games, brushing Tik Tok and reading novels. But when you persist, you will find that your previous sweat has not been in vain. It is also a kind of happiness to exercise alone. Come on, let's go.