Millions of North Americans participate in regular exer¬cise programs. This is a major achievement motivated by various advertisements and literature and the desire to feel fit and well and to possibly to stay alive longer. A few studies have suggested that cardiac death is more common in sedentary individuals than in the physically active, but further analysis of these studies revealed major defects in methodology and interpretation. Published studies on exercise and the risk of coronary heart disease lack standardization of the diagnosis of coronary heart disease, information on the effects of associated risk factors, and reliable evaluation of recreational or occupational physical activity.
Below are a number of studies that address exercise and its relation to cardiac disease.
A. San Francisco Longshoremen
To assess the role of physical exertion in relation to risk of fatal heart attack, the 1951–1972 work experience of 6351 San Francisco longshoremen was studied. Among men age 35–54 there were 24 heart attack deaths in those engaged in heavy work, 37 deaths in men classified as doing moderate work, and 28 deaths in those engaged in light work. Thus, there was no difference in the death rates in men age 35–54.

Страницы: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8