Physical activity and older people: a walk a day keeps the doctor away.
Ettinger
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D000368:Aged; D000375:Aging; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D005260:Female; D006304:Health Status; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D016138:Walking