The researchers were inspired by working with ultramarathoners, who can be sidelined by blisters despite years of training. These runners competed in the 2007 Badwater Ultramarathon in Death Valley, Calif. Chris Carlson/AP hide caption

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We know eating more produce is good for your heart. Now computer models suggest slashing the price by about a third could result in dramatically lower death rates from heart disease and stroke. iStockphoto hide caption

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Sylvester Williams, a Denver Broncos nose guard, nabs Isaiah Crowell of the Cleveland Browns last October. If measured by BMI, Williams is obese. AAron Ontiveroz/Denver Post via Getty Images hide caption

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If BMI Is The Test Of Health, Many Pro Athletes Would Flunk

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Ben Lecomte has swum across the Atlantic Ocean, and now he aims to traverse the Pacific, which will take him five or six months. Bongani Mlambo/The Longest Swim hide caption

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Can Extreme Exercise Hurt Your Heart? Swim The Pacific To Find Out

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