Abstract
It is not unreasonable to consider whether transformation of man by modern technology from a physically active to a sedentary creature has exacted a toll in cardiovascular disease. Indeed, evidence is accumulating from studies of the general population and a variety of occupational groups that this may well be true. The most sedentary appear subject to a substantially higher mortality from coronary disease.1 2 3 4 Until recently vigorous exertion was considered detrimental to the health of robust persons, let alone the one with potential cardiac disease. Awareness that regular exercise might be requisite for optimal cardiac function possibly had its beginning with . . .