title: Introduction to the Supplement.
authors.affiliation: a The Cooper Institute.
authors.forename: Kenneth H
authors.initials: KH
authors.lastname: Cooper
authors.forename: Donald L
authors.initials: DL
authors.lastname: Disney
authors.forename: Laura
authors.initials: L
authors.lastname: DeFina
authors.forename: Catherine L
authors.initials: CL
authors.lastname: Vowell
mesh_terms: D005080:Exercise Test; D006801:Humans; D006814:Hungary; D010809:Physical Fitness; D012574:Schools