title: Environmental influences, physical activity, and weight status in 8- to 16-year-olds.
abstract: OBJECTIVE
  To assess the association between vigorous physical activity, participation on sport teams and in exercise programs, television watching, family environment, and weight status in youth.
  
  
  METHODS
  Cross-sectional data from the Third National Health and Nutrition Examination Survey.
  
  
  METHODS
  A group of 2791 youth between the ages of 8 and 16 years who were enrolled in the Third National Health and Nutrition Examination Survey.
  
  
  METHODS
  Overweight was defined using age- and sex-specific 85th percentile of body mass index using Center for Disease Control and Prevention growth charts.
  
  
  RESULTS
  Both males and females who had an overweight mother and or father were more likely to be overweight compared with youth who did not have an overweight parent. Females who watched 4 or more hours of television were more likely to be overweight than those who watched less than 4 hours. Males and 14- to 16-year-old females who participated in sport team and exercise programs were less likely to be overweight than their counterparts who did not participate. Also, females with larger families and males from families with higher family incomes were less likely to be overweight.
  
  
  CONCLUSIONS
  These results suggest that family environment is associated with overweight in youth and that sport and exercise program participants are less like to be overweight and that, for females, increased television watching is related to overweight.
authors.affiliation: Department of Exercise Science, University of South Carolina, Columbia, SC 29208, USA. mdowda@sph.sc.edu
authors.forename: M
authors.initials: M
authors.lastname: Dowda
authors.forename: B E
authors.initials: BE
authors.lastname: Ainsworth
authors.forename: C L
authors.initials: CL
authors.lastname: Addy
authors.forename: R
authors.initials: R
authors.lastname: Saunders
authors.forename: W
authors.initials: W
authors.lastname: Riner
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D001835:Body Weight; D016009:Chi-Square Distribution; D002648:Child; D003430:Cross-Sectional Studies; D003710:Demography; D015444:Exercise; D005260:Female; D006801:Humans; D008019:Life Style; D016015:Logistic Models; D008297:Male; D009749:Nutrition Surveys; D009765:Obesity / Q000453:epidemiology*; D015995:Prevalence; D012307:Risk Factors; D012885:Skinfold Thickness; D013690:Television; D014481:United States / Q000453:epidemiology