Fitness teaching assistants, divided into group gymnastics course teaching assistants and personal teaching assistants, organize bodybuilders to do planned fitness exercises or aerobics, that is, the staff who guide the training of members in fitness clubs.

The most important duty of fitness teaching assistants is to help customers get healthy, and scientific fitness guidance is needed to make customers get healthy. Therefore, fitness teaching assistants should have professional knowledge such as human anatomy, physiology, medicine, nutrition, sports skills, etc., in addition to understanding psychology.