Daily DIY guide to getting fit for those with the fat factor

Maybe you CAN blame being fat on your genes. But there's a way to overcome that family history - just do three to four hours of moderate activity a day.

Sounds pretty daunting?

Not for the Amish people of Lancaster County, Pennsylvania, 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.