Fitness instructors usually use words to close your questions. You say it's too expensive, and the other party says you can take a method course, so you can exercise by yourself after teaching. Therefore, you need to approach your coach with words, not to mention that the course is expensive or you have no money. Just say that after experiencing the class, I feel that my physical fitness is still poor. I will practice by myself first, and then run. Then go to the fitness class. If you are a girl, tell her that you like yoga, and the boy will tell her that she wants to learn spinning.