Exercise is good for you. More specifically, intense exercise seems to protect the length of the heart's telomeres, which are the ends of your DNA strands and

Exercise is good for you. More specifically, intense exercise seems to protect the length of the heart's telomeres, which are the ends of your DNA strands and shorten as you get older. They are linked to the effects of aging, so delaying their shortening would seem to indicate delaying the effects of aging.