Study: When kids become teens, they get sluggish (AP)

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Study: When kids become teens, they get sluggish (AP)

AP - One of the largest studies of its kind shows just how sluggish American children become once they hit the teen years: While 90 percent of 9-year-olds get a couple of hours of exercise most days, fewer than 3 percent of 15-year-olds do.

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