title: Physical activity guidelines.
authors.affiliation: NCSL--Denver, USA. amy.winterfeld.ncsl.org
authors.forename: Amy
authors.initials: A
authors.lastname: Winterfeld
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D015444:Exercise; D035082:Federal Government; D017408:Guidelines as Topic; D006801:Humans; D008875:Middle Aged; D014481:United States