The scope of practice for a personal trainer has a primary focus on prevention and involves enhancing components of health and fitness for the general, healthy population or those cleared for exercise.

Proper exercise prescription may result in improved body composition, physical performance, heart condition, and health outcomes. The decision to hire a personal trainer may be related to a perceived health threat, a lack of knowledge, or a personal belief in one’s ability to begin and adhere to an exercise program. Often clients will seek the guidance of a personal trainer for factors related to motivation and adherence. A personal trainer pays close attention to the client’s exercise technique, workout routine, goals, values, and nutrition. Personal training in men and women has been shown to improve the benefit-to-concern ratio for exercise (decisional balance), and increase confidence to choose exercise in the face of other time demands (scheduling self-efficacy). Personal training results in higher strength, higher workout intensities, and higher perceived exertion during exercise.