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With game consoles and the Internet, children are playing as much as they always have—but now, they sit still while doing it. Kids spend as much time watching TV, using computers, and playing video games as they spend in school each week. One in every three kids in America is considered overweight or obese, and the number one concern that parents bring up to pediatricians is keeping kids fit. Half of all children are not physically active enough for the development of a healthy cardiovascul...