Gym is not to train athletes, but to guide members to keep fit.
If you want to go:
At least have a coaching certificate. People who want to take the exam.
A variety of knowledge of fitness instructors, such as various muscle parts of the human body, how to exercise in various parts and so on.
Share a fitness knowledge WeChat official account: Jason teaches you to learn fitness?
You can learn the knowledge that a fitness instructor needs to master on a zero basis.