Is there a 24-hour gym in Tianjin?
I don't think so, because it is too unscientific. . . Usually, it is best for people to exercise from 4 pm to 7 pm, because at this time, the human body is easily excited and can fully warm up to avoid sports injuries. However, people are very tired in the middle of the night. At this time, fitness not only can't exercise, but will damage the body function.