The gym and the coach are under great pressure. First of all, they must keep in good condition, which will waste a lot of time. Second, their main source of income is selling private education, and they often find others to sell courses during exercise. Thirdly, they may have participated in some exercises, so they are very tired both physically and mentally. This is not easy to do, it is better to join the membership. If personal education fails to meet the requirements for one month, you may be fired, so the coach is a salesman and should exercise regularly.