Exercise capacity prior to myocardial infarction relates inversely to enzyme activity during infarction

Epidemiological studies suggest that myocardial infarction occurs less commonly in physically fit individuals, indicating an inverse relationship between fitness and coronary arterial disease. In this study, the exercise capacity measured prior to infarction, was related to enzyme activity during subsequent infarction. Out of 512 consecutive male patients with acute infarction 35 were found who had previously performed an eligible exercise test. The exercise capacity was inversely related to enzymic activity during the infarction.