more evidence that physical activity helps kids learn better

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Many U.S. middle school kids physically unfit: study

NEW YORK (Reuters Health) - U.S. kids are not only too heavy; they're also out of shape, according to a new study of 5th and 7th grade students in Georgia.

Half didn't reach minimum standards for healthy aerobic fitness, Dr. Kenneth E. Powell, a physician in private practice, and his colleagues found, while nearly a quarter didn't make the grade in terms of muscle fitness, endurance or flexibility.

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