Is Marathon Running Bad for the Heart?

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By Gretchen Reynolds

When word circulates that a runner has died of a heart attack, as the inexhaustible
ultra marathoner Micah True did last month during a solo wilderness trail run, many people
begin to wonder about the healthiness of prolonged strenuous activity. Could marathon
training and racing perhaps have damaged the heart muscle of the 58-year-old Mr. True, a lead character in the book “Born to Run”? And, conversely, shouldn’t marathon training have made him – and, by extension, all runners – immune to heart disease? Read the full article here.

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