title: Adolescents' Sedentary Behaviors in Two European Cities.
abstract: OBJECTIVE
  The aim of this study was to determine and compare the correlates of objective sedentary behavior (SB) and nonschool self-reported SB in adolescents from 2 midsized cities, 1 in France (Tarbes) and 1 in Spain (Huesca). Stability of objective SB and nonschool self-reported SB were also assessed at different time points during 1 academic year.
  
  
  METHODS
  Starting with a total of 829 participants and after applying inclusion criteria, objective SB was assessed for 646 adolescents (Mage = 14.30 ± 0.71 years) with GT3X accelerometers for 7 days at 2 time points. Nonschool self-reported SB was measured for 781 adolescents (Mage = 14.46 ± 0.76 years) at 3 time points by means of a questionnaire. Data were analyzed using multiple regression analysis.
  
  
  RESULTS
  Gender and ambient temperature emerged as the main statistically significant correlates in all objective SB models, showing higher objective SB levels in girls and lower objective SB levels when ambient temperature was higher. According to nonschool self-reported SB, a gender effect was found in almost all behaviors. Whereas boys spent more time playing with video games as well as games on their mobile phones, girls spent more time studying and using their computers and mobile phones to communicate with each other. The findings showed a statistically significant city effect on study time (Huesca > Tarbes) and video games and telephone communication time (Tarbes > Huesca).
  
  
  CONCLUSIONS
  Nonschool self-reported SB patterns were different in Huesca and Tarbes. Intervention programs should be adapted to target the reduction of adolescents' SB according to different contexts.
authors.affiliation: a University of Zaragoza.
authors.forename: Alberto
authors.initials: A
authors.lastname: Aibar Solana
authors.forename: Julien E
authors.initials: JE
authors.lastname: Bois
authors.forename: Javier
authors.initials: J
authors.lastname: Zaragoza
authors.forename: Noëlle
authors.initials: N
authors.lastname: Bru
authors.forename: Thierry
authors.initials: T
authors.lastname: Paillard
authors.forename: Eduardo
authors.initials: E
authors.lastname: Generelo
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000367:Age Factors; D015992:Body Mass Index; D005260:Female; D005602:France; D006801:Humans; D008297:Male; D057185:Sedentary Behavior; D057566:Self Report; D012737:Sex Factors; D012923:Social Class; D013030:Spain; D011795:Surveys and Questionnaires; D013696:Temperature
keywords: leisure time; media; screen time; sedentariness