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How much exercise does your teen get?

A new European study has found that one hour of moderate to vigorous exercise a day can help teens beat the effects of a common obesity-related gene with the nickname "fatso." Does your teen get that much exercise?

A new European study has found that one hour of moderate to vigorous exercise a day can help teens beat the effects of a common obesity-related gene with the nickname "fatso." Does your teen get that much exercise?