First of all, in terms of professional knowledge, fitness instructors are advised to read the following books:
Foundation of strength training-mainly talking about the principle of strength training, relying on squat, hard pull and bench press, which is very helpful for fitness coaches to learn the principle of strength training in depth.
Anatomy training-a good book for fitness coaches to study anatomy in depth.
Body Correction Guide-a comprehensive book on body posture published by foreign body correction experts. Body shape has a great influence on fitness, and this book can be said to be a must-read for all-round fitness coaches.
"Sports nutrition"-practice three points and eat seven points. Fitness coaches should not only know how to practice, but also know how to arrange their members' diet reasonably, so Sports Nutrition is a must-read book for fitness coaches.
If you want to know more about fitness, I suggest reading books from ACE, NSCA and other institutions.
In addition, in terms of career planning, "From Excellence to Excellence-How to Become a Successful Fitness Coach" is also worth seeing.