... clubowners and managers, personal trainers, organizational consultants,sport psychology consultants, allied health and rehabilitation profes-sionals, and students (graduate and undergraduate) who ... be inactive, the reasons why others beginan exercise program and then quit, and what each of us can do to start and maintain a regular exercise regimen, a concept calledadherence, and to offer ... important ways to improve the health and quality of life of their clients.DEFINING PHYSICAL ACTIVITY, EXERCISE, AND FITNESS If mental health professionals are going to help clients develophealthy...