Fitness instructors need to have certain professional knowledge and skills, such as human anatomy, sports physiology, sports nutrition, sports psychology and so on. In addition, fitness instructors need to have good communication skills and service awareness, be able to make personalized training plans according to customers' needs, and provide professional guidance and suggestions to customers.

In a word, a person who is suitable to be a fitness instructor should not only have professional knowledge and skills, but also have good communication skills and service awareness.