Nowadays, with the rapid development of economy, many people begin to demand to improve their quality of life, and most people fall in love with fitness. As a result, various gyms have mushroomed, opening one after another. The more gyms there are, the more employees are needed. In many cases, if the gym is too big, it is not enough to maintain it only by a few coaches and salesmen. At this time, gyms usually recruit some apprentices. Apprentices usually follow the master, mainly sorting out equipment and helping the master train students. If the apprentice does well, he will have the opportunity to become a fitness instructor in the future, and he can also help the gym to expand customers at ordinary times.