1913 Journal of the American Medical Association (JAMA)  
be demonstrated; on the other hand, minute solid granule-like substances enter more frequently the left artery than the right, which ¡s referable to the asymmetrical branching of the aorta. Strubel] of Dresden reported on the influence of physical exercise on the function of the heart, lie has examined swimmers, skaters, pugilists and other athletes and found that the influence of rational physical exercise on the fund ion Of the heart, is favorable. Un the other hand, all excesses which tend
more » ... increase the arterial pressure and tax the heart Unusually were found to be decidedly injurious. Thus box¬ ing, ¡if least as carried on by professional boxers, must be regarded as unfavorable for the heart, in spite of the marked strengthening of the musculature. These pugilists die young, generally before the fortieth year.
doi:10.1001/jama.1913.04340230053027 fatcat:7mjukcrcebbhlaxjeju2vuwhhu