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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AAron Ontiveroz/Denver Post via Getty Images

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

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Government workers exercise at their office in Mexico City, August 2013. To counter the obesity epidemic, the city requires all government employees to do at least 20 minutes of exercise each day. Tomas Bravo/Reuters /Landov hide caption

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Tomas Bravo/Reuters /Landov

Overweight People In Developing World Outnumber Those In Rich Countries

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Posting a picture like this on the fridge might seem like good motivation for weight loss. But scientists say it might instead inspire weight gain. iStockphoto.com hide caption

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iStockphoto.com

Can Skinny Models Undermine Your Dieting Goals?

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