title: Physical activity does not attenuate the obesity risk of TV viewing in youth.
abstract: OBJECTIVE
  This study aimed to examine the association of television (TV) time, the frequency of meals while watching TV and the presence of TV set in the bedroom with total and abdominal obesity and to assess whether physical activity (PA) attenuates the obesity risk of TV viewing.
  
  
  METHODS
  Cross-sectional data were obtained from 2200 adolescents (46% boys) from 10 European cities, The Healthy Lifestyle in Europe by Nutrition in Adolescence study, between 2006 and 2007. TV viewing, PA (by accelerometry) and body composition were measured. Binary logistic regression analyses were performed.
  
  
  RESULTS
  Even adjusting by vigorous PA, TV in the bedroom (odds ratio [OR]: 1.33, 95% confidence interval [CI], 1.01-1.74) and >4 h d(-1) TV during week days (OR: 1.30, 95% CI, 1.02-1.67) (in boys) and eating every day with TV (OR: 1.18, 95% CI, 1.07-1.30) and >2 h d(-1) TV during weekend days (OR: 1.68, 95% CI, 1.25-2.26) (in girls) were significantly associated with total obesity. Likewise, in both sexes, having a TV set at bedroom was significantly associated with abdominal obesity.
  
  
  CONCLUSIONS
  Adolescents spending excessive TV time are prone to obesity independently of their PA levels. Families should put TV sets out of adolescents' bedroom and keep TV sets off during meal times.
authors.affiliation: Growth, Exercise, Nutrition and Development (GENUD) Research Group, University of Zaragoza, Zaragoza, Spain. jprey@unizar.es
authors.forename: J P
authors.initials: JP
authors.lastname: Rey-López
authors.forename: J R
authors.initials: JR
authors.lastname: Ruiz
authors.forename: G
authors.initials: G
authors.lastname: Vicente-Rodríguez
authors.forename: L
authors.initials: L
authors.lastname: Gracia-Marco
authors.forename: Y
authors.initials: Y
authors.lastname: Manios
authors.forename: M
authors.initials: M
authors.lastname: Sjöström
authors.forename: I
authors.initials: I
authors.lastname: De Bourdeaudhuij
authors.forename: L A
authors.initials: LA
authors.lastname: Moreno
mesh_terms: D056044:Actigraphy / Q000295:instrumentation; D050154:Adiposity; D000293:Adolescent; D000294:Adolescent Behavior; D000367:Age Factors; D000886:Anthropometry; D003430:Cross-Sectional Studies; D005060:Europe / Q000453:epidemiology; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009043:Motor Activity; D056128:Obesity, Abdominal / Q000453:epidemiology / Q000503:physiopathology / Q000517:prevention & control* / Q000523:psychology; D016017:Odds Ratio; D018570:Risk Assessment; D012307:Risk Factors; D057185:Sedentary Behavior; D011795:Surveys and Questionnaires; D013690:Television; D013997:Time Factors