The family doctor is the ideal person to lead his patients back to a form of existence which is more dynamic and health-promoting than their customary way of life. Many basic fears of doctors are unfounded, for it is not difficult to acquire a knowledge of the ergological principles involved in natural movement and sport. Patients should be guided into 'forgetting' about their ailments, but at the same time remembering their limitations. The prescription of sensible forms of exercise, e.g. walking and jogging, is advocated. Some tried and sensible programmes are given.