A new study shows a potential link between extreme endurance exercise and increased risk of advanced colon cancer in younger adults, according to research at Inova Schar Cancer Institute, in Fairfax, ...

A small, preliminary study found that marathoners were much more likely to have precancerous growths. Experts aren’t sure why. A study of 100 marathon and ultramarathon runners aged 35 to 50 found ...

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The three patients should have been portraits of health. They were young, lean and physically active. Unusually active, in fact: Two regularly ran 100-mile ultramarathons, and one had completed 13 ...