You can go to a professional fitness instructor training school for training. If you want to find a good private school, you can choose it according to the teaching mode, teaching staff, teaching environment, courses, employment and so on. Fitness instructors need to learn professional sports nutrition, sports anatomy, sports physiology, sports psychology, sports biomechanics and other professional knowledge, and master the foundation more solidly, so that their future development will be better. Practical skills include resistance exercise of instruments, active and passive stretching of muscles, use of aerobic instruments and teaching skills.