Major. Compared with ordinary coaches in gymnasiums, they are more professional in theoretical literacy, professional knowledge and matters needing attention.

Education. I'm not sure this article counts. If education is an advantage, both introduction and publicity have advantages.

Major. Students majoring in physical education have the specialty of specialized courses and combine theoretical knowledge. More thorough from the inside out.

Poor experience. If you are a step-by-step coach, summarize more effective exercise methods and experience of avoiding injuries.

Age. It would be better if you won an award at school, or if you were the chairman of a club or something. Graduated from college, about 24 years old.

Experience. Social experience, interpersonal relationship and customer communication all take time, but enough patience is enough.

The most important thing is self-confidence, opportunity and willingness to work hard!