A fitness trainer is a person who heads, instructs, and encourages willing people or groups in various workout activities. They teach you how to do them properly as well as ways to lessen injuries while doing them. An effective fitness trainer also monitors your progress, and even provide educative health and fitness information to their clients. And if you ever hurt yourself during one of your sessions, he or she will know how to apply first aid kit. Basically, he’s going to teach you how to score in the health and fitness department.