title: Where can they play? Outdoor spaces and physical activity among adolescents in U.S. urbanized areas.
abstract: OBJECTIVE
  To estimate behavior-specific effects of several objectively measured outdoor spaces on different types of moderate to vigorous physical activity (MVPA) in a large, diverse sample of U.S. adolescents.
  
  
  METHODS
  Using data from Wave I (1994-1995) of the National Longitudinal Study of Adolescent Health (U.S., n=10,359) and a linked geographic information system, we calculated percent greenspace coverage and distance to the nearest neighborhood and major parks. Using sex-stratified multivariable logistic regression, we modeled reported participation in wheel-based activities, active sports, exercise, and ≥ 5 MVPA bouts/week as a function of each outdoor space variable, controlling for individual- and neighborhood-level sociodemographics.
  
  
  RESULTS
  Availability of major or neighborhood parks was associated with higher participation in active sports and, in females, wheel-based activity and reporting ≥ 5 MVPA bouts/week [OR (95% CI): up to 1.71 (1.29, 2.27)]. Greater greenspace coverage was associated with reporting ≥ 5 MVPA bouts/week in males and females [OR (95% CI): up to 1.62 (1.10, 2.39) for 10.1 to 20% versus ≤ 10% greenspace] and exercise participation in females [OR (95% CI): up to 1.73 (1.21, 2.49)].
  
  
  CONCLUSIONS
  Provision of outdoor spaces may promote different types of physical activities, with potentially greater benefits in female adolescents, who have particularly low physical activity levels.
authors.affiliation: Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516-3997, USA. boonej@unc.edu
authors.forename: Janne
authors.initials: J
authors.lastname: Boone-Heinonen
authors.forename: Kathleen
authors.initials: K
authors.lastname: Casanova
authors.forename: Andrea S
authors.initials: AS
authors.lastname: Richardson
authors.forename: Penny
authors.initials: P
authors.lastname: Gordon-Larsen
mesh_terms: D000293:Adolescent; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009043:Motor Activity; D010988:Play and Playthings; D011998:Recreation; D012111:Residence Characteristics; D012737:Sex Factors; D012959:Socioeconomic Factors; D013177:Sports / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology; D014505:Urban Population / Q000706:statistics & numerical data*; D055815:Young Adult