During exercise, the cardiovascular system must supply muscles with large amounts of oxygen and fuel and get rid of a lot of wastes. How do the cardiovascular systems of athletes respond to prolonged exercise? Researchers used echocardiography, a sonogram of the heart, to estimate the mass of the left ventricle in current athletes, non-athletes, and ex-athletes. The data are graphed below (*** means P<0.001, and the P value comparing non-athletes and ex-athletes is >0.05). What conclusion can be drawn from the graph?

Video transcript

Hello, everyone here We have a question asking us who among the following are most likely to exhibit symptoms of left ventricular hypertrophy. So what is left ventricular hypertrophy? That is the thickening of the walls, heart, of the wall, of the heart's main pumping chamber and a higher left ventricular mass allows the heart to pump more blood per minute, two exercising muscles to meet the muscles demand for oxen delivery and carbon dioxide removal. So current athletes are more likely to have a higher left ventricular mass. So our answer here is a current athletes. Thank you for watching. Bye.