Fitness instructor deserves to be a lifelong career. Although the older you get, your physical fitness will indeed be affected. However, due to long-term exercise, physical fitness is much better than peers. In addition, a fitness instructor is a guiding profession, which mainly helps fitness members to keep fit scientifically, without having a strong body. Although there are fewer elderly fitness instructors in the gym now, it is not without them. I believe that with the development of the fitness industry, more and more people will always adhere to the route of fitness instructors.