Is it difficult to train an all-round fitness instructor?

Nothing is bitter, as long as you like, how to practice is cool. I studied in Xi for three months. A few days before going there, I felt very tired. In addition, the teacher of Chuangti is very strict. I have to learn many theories and practices every day, and I have to train freely. Later, I got used to it. Looking back now, those months when I was a sports coach were the most fulfilling life.