Nutrition is well-recognized as a necessary component of educational programs for physicians. This is to be valued in that of all factors affecting health in the United States, none is more important than nutrition. This can be argued from various perspectives, including health promotion, disease prevention, and therapeutic management. In all cases, serious consideration of nutrition related issues in the practice is seen to be one means to achieve cost-effective medical care. These modules were developed to provide more practical knowledge for health care providers, and in particular primary care physicians. This module is designed to help the primary care physician to identify the relationship between nutrition and physical activity. Efforts are made to examine health maintenance aspects as well as the physical development aspects of the relationship. Diet and fitness fads are explored to assist the physician in counseling patients regarding such fads. Included are learning goals and objectives, a self-check of achievement with regard to goals, references, and lists of resources for patients and physicians. Appendices include sample menus, daily food requirements for training and endurance, and sample menus for a high calorie diet, including a set for ovolactovegetarians. (CW)