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August 11, 1928


JAMA. 1928;91(6):400-401. doi:10.1001/jama.1928.02700060034015

In this age of excessive activities and of the vogue for competitive athletics, not only in athletic associations, universities, colleges and preparatory schools for both sexes but also in high schools and even in grammar schools, the athletic heart and heart strain are subjects of constant interest. Recently the Kahns1 have emphasized anew that the circulation and the heart can stand strain without harm if the person has been trained to gradually increasing labor or athletic work. But the heart must rest for a considerable period after such exertion before the exertion is renewed, even when the person has been trained to violent effort, else cardiac strain will occur. If the strain is too frequently repeated or too prolonged, even in a trained athlete, feats of strength and endurance will cause respiratory and circulatory injury. The greatest strain in athletics occurs in rowing, running and fast bicycle riding, and

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