SPECIAL ARTICLE

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Abstract
The purposes of a physical training program are examined and the evidence for the general and circulatory benefits of physical fitness is discussed. While the proof of benefits is not established, there is sufficient evidence from current studies to justify encouragement of the exercise programs. The evidence that exercise lessens experimental atherogenesis is equivocal. The possibility that physical fitness alters the morbidity and mortality of coronary sclerosis remains conjectural. Whether a physical fitness program would (1) lessen the incidence of intravascular thrombosis or atheromatous ulceration, (2) increase the extent or rate of development of coronary collaterals in man although the evidence in animals is suggestive, (3) improve the performance capacity of the heart, (4) decrease the likelihood of arrhythmias, or (5) result in more efficient bodily responses to the stresses associated with myocardial infarction is not clear or has not been definitely ascertained because of lack of evidence.

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