title: Sedentary patterns and media availability in European adolescents: The HELENA study.
abstract: OBJECTIVE
  To describe sedentary behaviors in adolescents and to examine the influence of media availability on TV viewing.
  
  
  METHODS
  The study assessed 3278 adolescents (1537 males and 1741 females, 12.5-17.5 years) involved in the HELENA study (2007). Adolescents reported hours of TV viewing, computer games, console, internet for study and non-study reasons, and study, as well as availability of TVs, computers and consoles.
  
  
  RESULTS
  Time spent in sedentary behaviors was higher during weekends (all p<0.001). Males spent more hours on TV viewing (for > or = 15 years at weekends), playing computer games and console games while females spent more time studying and surfing for non-study reasons. During weekdays, one third of adolescents exceeded the screen time guidelines (>2h/day) based solely on TV viewing, whereas around 60% exceeded it at weekends. Having a TV or a console in the bedroom was associated with higher TV viewing (OR=2.66; 95% CI 2.23-3.18; and OR=1.92; 95% CI 1.61-2.28, respectively) whereas the presence of computer reduced it (OR=0.57; 95% CI 0.48-0.68).
  
  
  CONCLUSIONS
  Adolescents living in Europe are not meeting media recommendations, especially during weekend. The absence of a TV in the adolescents' bedroom might reduce TV viewing. Further studies are needed to confirm or contrast our findings.
authors.affiliation: GENUD (Growth, Exercise, Nutrition and Development) Research Group, Zaragoza, Spain. jprey@unizar.es
authors.forename: Juan P
authors.initials: JP
authors.lastname: Rey-López
authors.forename: Germán
authors.initials: G
authors.lastname: Vicente-Rodriguez
authors.forename: Francisco B
authors.initials: FB
authors.lastname: Ortega
authors.forename: Jonatan R
authors.initials: JR
authors.lastname: Ruiz
authors.forename: David
authors.initials: D
authors.lastname: Martinez-Gómez
authors.forename: Stefan
authors.initials: S
authors.lastname: De Henauw
authors.forename: Yannis
authors.initials: Y
authors.lastname: Manios
authors.forename: Denes
authors.initials: D
authors.lastname: Molnar
authors.forename: Angela
authors.initials: A
authors.lastname: Polito
authors.forename: Maite
authors.initials: M
authors.lastname: Verloigne
authors.forename: Manuel J
authors.initials: MJ
authors.lastname: Castillo
authors.forename: Michael
authors.initials: M
authors.lastname: Sjöström
authors.forename: Ilse
authors.initials: I
authors.lastname: De Bourdeaudhuij
authors.forename: Luis A
authors.initials: LA
authors.lastname: Moreno
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D002648:Child; D005060:Europe / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D057185:Sedentary Behavior; D017678:Sex Distribution; D013690:Television / Q000706:statistics & numerical data* / Q000600:supply & distribution; D018910:Video Games / Q000706:statistics & numerical data* / Q000600:supply & distribution