title: Use of Social Networking Sites and Adherence to Physical Activity and Screen Time Recommendations in Adolescents.
abstract: Adolescents are recommended to achieve ≥ 60 min/day of moderate-to-vigorous physical activity (PA) and ≤2 h/day of screen time (ST). This study examined the relationships between the use of social networking sites (SNSs) and adherence to PA and ST recommendations in a large sample of Canadian adolescents.
  
  
  
  This cross-sectional school-based survey included a representative sample of 9388 students in grades 7 to 12 across Ontario, Canada.
  
  
  
  After adjustment for several confounding variables, results showed that male adolescents who use SNSs for fewer hours (≤ 1 h/day) had greater odds of adherence to PA and to both PA and ST recommendations concurrently, while those who use it for more hours (≥ 3 h/day) had lower odds of adherence to the ST recommendation. Female adolescents who use SNSs for more hours had lower odds of adherence to the ST recommendation (use of SNSs ≥ 2 h/day) and to both PA and ST recommendations concurrently (use of SNSs ≥ 5 h/day).
  
  
  
  Heavy use of SNSs has a negative influence on the adherence to the ST recommendation in both males and females; however, infrequent use of SNSs was related to the adherence to the PA recommendation and concurrent adherence to both recommendations in males only.
authors.affiliation: Ottawa Public Health, Ottawa, Ontario, Canada.
authors.forename: Hugues
authors.initials: H
authors.lastname: Sampasa-Kanyinga
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Chaput
mesh_terms: D000293:Adolescent; D002170:Canada; D003430:Cross-Sectional Studies; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D009765:Obesity / Q000517:prevention & control; D009864:Ontario; D050177:Overweight / Q000517:prevention & control; D010349:Patient Compliance; D012306:Risk; D012737:Sex Factors; D060756:Social Networking; D013334:Students / Q000706:statistics & numerical data; D013997:Time Factors; D018910:Video Games