Word: cardiac
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...results of overtraining have been much exaggerated. The percentage of athletes injured in this way is small. Out of over 4000 men examined who were members of various Harvard teams not over one per cent were affected with the slightest cardiac trouble. It is in those events in which there are long strains and few intervals of rest that the heart is most strained, such as tugs-of war; but in football the heart has intervals of rest and the strain is not great...