Several years ago a boy of 15 was brought to one of us with a markedly dilated heart. For some weeks he had been running a mile nearly every afternoon at one of the best-known boarding schools in New England. Since then, among others, a boy with pulmonary tuberculosis, another with so-called physiologic albuminuria, another with leukemia, a fourth with pronounced cardiac insufficiency and much overgrown, from four different and all excellent boarding schools, have been brought to the attention of one of us, and in none of them had their condition been recognized or properly studied. The observation of these cases stimulated this preliminary study of selected boys before and after exercise at a number of boarding-schools.
We first examined 38 boys, 36 of them from five boarding schools, two in Connecticut, two in New York and one in New Jersey ; and 2 of the boys from a