ABSTRACT In recent years, ultra-resistance sports have become major events. Its growing popularity contrasts with epidemiological evidence that suggests that intense or prolonged physical exercise may not be as beneficial as moderate. On the other hand, it is known that markers of myocardial damage and ventricular dysfunction, such as troponins and natriuretic peptides, may rise soon after endurance sports events, particularly in the ultra-resistance disciplines. As might be expected, some authors have suggested that extremely intense or prolonged exercise could […]