title: [Physical activity and fitness--their relevance to health and medicine].
authors.forename: A
authors.initials: A
authors.lastname: Simkin
authors.forename: H
authors.initials: H
authors.lastname: Ruskin
mesh_terms: D015444:Exercise / Q000502:physiology*; D006304:Health Status; D006801:Humans; D010809:Physical Fitness / Q000502:physiology*; D011634:Public Health