title: Assessment of physical activity, and physical fitness, in population surveys.
authors.forename: G D
authors.initials: GD
authors.lastname: Smith
authors.forename: J N
authors.initials: JN
authors.lastname: Morris
mesh_terms: D004651:Employment; D004734:Energy Metabolism; D015444:Exercise; D006801:Humans; D007899:Leisure Activities; D005082:Physical Exertion; D010809:Physical Fitness; D011159:Population Surveillance; D011795:Surveys and Questionnaires