Many gyms make money by private teaching, that is, asking coaches to give you one-on-one guidance. Time is relatively free, and the price gap is very large. The better the gym, the higher the charge, generally 2 1 class, about one and a half hours. Of course, there is a big gap between inviting and not inviting, because fitness is not like aerobic exercise like basketball and football. It requires strict planning, standardized movements and reasonable diet. People who have just started fitness want to get started. You'd better let the coach teach you for a month before practicing by yourself.