The main content of the textbook is devoted to the presentation of the basics of the training process in the gym. Theory, biomechanics, strength training practice, as well as aerobic training in the cardio zone and flexibility training are considered. The textbook includes chapters describing the organization of personal training, the basics of nutrition, sports medicine. Separate sections are devoted to the basics of marketing the "personal training" service, the psychological aspects of motivating and retaining customers.