A personal gym trainer has a varying degree of knowledge of general physical fitness in the course of training and prescription. They encourage customers to set goals and provide customers with feedback and accountability. Personal Trainers measure the strengths and weaknesses of their customers with fitness evaluations. Such fitness tests can be carried out to measure improvements in the physical condition of its client before and after the exercise program. Although gym trainers want you to get the maximum benefit, they still try to hide some information from you.