No matter what kind of industry it is now, it will have the nature of sales more or less, and so will fitness instructors, who should also have certain sales ability. Although the job of a fitness coach is to guide people with their professional knowledge and skills and make fitness plans, as a fitness coach, they still have to sell classes in order to develop better. The sales of fitness instructors are not just sales promotion. The purpose of fitness coach is to make a healthy and scientific fitness plan for members, help members complete fitness tasks and achieve the purpose of fitness.