You must need a fitness instructor. Now the fitness instructor is an important department in the gym, and most members don't know the fitness knowledge. Without a fitness instructor, many members exercise according to their own ideas, which is easy to get hurt. The role of a fitness coach is to give members correct movement guidance, so the gym needs a fitness coach very much. For novice members, it is necessary to find a fitness instructor to guide the training, so as to avoid injury and achieve good training results in less time.