Physical activity and health.
Powell
K E
KE
Pratt
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D000328:Adult; D002648:Child; D015444:Exercise; D005260:Female; D006293:Health Promotion; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D014481:United States; D014505:Urban Population