Fitness instructors need to have professional fitness knowledge and skills. You can apply for professional fitness instructor qualification certificate in training institutions, and choose fitness instructor institutions according to teaching mode, teaching teachers, teaching environment, courses, employment and other aspects. The examination contents of fitness instructor include professional sports nutrition, sports anatomy, sports physiology, sports psychology, sports biomechanics, health and fitness and professional ethics of fitness instructor. Only by mastering the foundation more solidly can the future development be better. Practical skills include resistance exercise of instruments, active and passive stretching of muscles, use of aerobic instruments and teaching skills.