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This is Scientific American 60-Second Health. I'm Dina Fine Maron. Got a minute?

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Hey kids, here's a good reason to work up a sweat:

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when young people exercise for an hour each day it also helps boost their brain power.

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That's according to a study of more than 200 kids in the journal Pediatrics.

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Seven, eight and nine year-olds were randomly selected to enroll in an after-school exercise program or be placed on a wait list.

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The exercisers performed much better on intellectual tests.

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And there was a dosage effect: kids who spent more time in the program performed even better than kids who were enrolled in the program but had spotty attendance.

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Government guidelines already recommend that everyone aged 6 to 17 engage in an hour or more of moderate- and vigorous-intensity physical activity daily,

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but many kids still do not meet this threshold.

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Better cognitive capabilities could be a selling point for more exercise.

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The study could not tease apart how much increased physical fitness versus social interactions in the exercise program may have contributed to better accuracy on cognitive tasks.

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But other work has suggested that exercise is better for cognition than social interactions alone.

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Regardless, a workout that offers both is a win-win.

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Thanks for the minute, for Scientific American 60-Second Health. I'm Dina Fine Maron.

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