Got a fat gene? Get active for 3-4 hours a day

CHICAGO (AP (AP) -- Maybe you CAN blame being fat on your genes. But there's a way to overcome that family history - just get three to four hours of moderate activity a day. Sound pretty daunting? Not for the Amish of Lancaster County, Pa., who were the focus of a new study on a common genetic variation that makes people more likely to gain weight. It turns out the variant's effects can be blocked with physical activity - lots of it....

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