title: Adolescent girls' exposure to physical activity-promoting environments.
abstract: OBJECTIVE
  To examine self-reported exposure to a physical activity (PA) promoting intervention and changes to school environmental PA factors.
  
  
  METHODS
  Randomly selected 8(th) grade girls in year 2 (N = 3469) and year 3 (N = 3462) completed surveys on exposure to the health education, PE components, PA programming, and PA supporting messages. Girls' perceptions of their school-environment and an assessment of school environmental factors by principals in support of PA also were measured. Analysis included generalized linear mixed models with random effects for site and school comparing intervention and control schools.
  
  
  RESULTS
  Year 2 intervention girls reported greater exposure to all 4 components of the intervention compared to control school girls. In year 3, differences by treatment disappeared in all but 2 components.
  
  
  CONCLUSIONS
  Intervention girls were exposed to TAAG in year 2 with effects diminishing in year 3.
authors.affiliation: University of Maryland School of Public Health, Department of Epidemiology and Biostatistics, College Park, MD, USA.
authors.forename: Mira
authors.initials: M
authors.lastname: Grieser
authors.forename: Brit I
authors.initials: BI
authors.lastname: Saksvig
authors.forename: Gwen M
authors.initials: GM
authors.lastname: Felton
authors.forename: Diane J
authors.initials: DJ
authors.lastname: Catellier
authors.forename: Larry S
authors.initials: LS
authors.lastname: Webber
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D004777:Environment; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006293:Health Promotion; D006801:Humans; D009043:Motor Activity; D012574:Schools