The best way is to obtain fitness instructor qualification certification by attending fitness instructor training class.

1. If you want to be a fitness instructor, you need to learn basic daily training, which can generally be taught by a coach or learned through some videos and books. Basic daily training is very important.

It is also necessary to find some books to study, because theoretical knowledge is also very important. If you don't have good theoretical knowledge, you can't be a fitness coach, because many scientific trainings can make students train better.