title: Perceptions and attitudes about body weight and adherence to the physical activity recommendation among adolescents: the moderating role of body mass index.
abstract: OBJECTIVE
  We examined the associations between perceptions and attitudes about body weight and adherence to the physical activity recommendation (PAR) for adolescents to achieve ≥60 min/day of moderate-to-vigorous physical activity and tested whether body mass index (BMI) was a moderator of these relationships.
  
  
  METHODS
  Cross-sectional survey.
  
  
  METHODS
  Self-reported data from Canadian adolescents (n = 4299) who participated in the 2013 Ontario Student Drug Use and Health Survey were analysed.
  
  
  RESULTS
  Dissatisfaction with body weight was associated with lower odds of adherence to the PAR (odds ratio [OR]: 0.74; 95% confidence interval [CI]: 0.55-0.99). More specifically, those who perceived themselves as overweight/obese had lower odds of adherence to the PAR (OR: 0.59; 95% CI: 0.42-0.81) compared with those who think they were about the right weight. Those who were trying to gain weight were more likely to adhere to the PAR (OR: 1.92; 95% CI: 1.29-2.86) compared to those who were doing nothing about their body weight. BMI was a significant moderator of the association between dissatisfaction with body weight and adherence to the PAR. At low BMI, there were no differences in the adherence to the PAR between adolescents who were dissatisfied with their body weight or not. At high BMI, adolescents who were dissatisfied with their body weight were less likely to adhere to the PAR than those who were not dissatisfied with their weight. Results were not different between males and females.
  
  
  CONCLUSIONS
  Results suggest that adolescents who are dissatisfied with their body weight have lower adherence to the PAR, particularly those who are overweight or obese.
authors.affiliation: Ottawa Public Health, Ottawa, Ontario K2G 6J8, Canada; School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada. Electronic address: hugues.sampasa@ottawa.ca.
authors.forename: H
authors.initials: H
authors.lastname: Sampasa-Kanyinga
authors.affiliation: Centre for Addiction and Mental Health, Toronto, Ontario M5S 2S1, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5T 3M7, Canada.
authors.forename: H A
authors.initials: HA
authors.lastname: Hamilton
authors.affiliation: Ottawa Public Health, Ottawa, Ontario K2G 6J8, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Willmore
authors.affiliation: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario K1H 8L1, Canada; Department of Pediatrics, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8L1, Canada.
authors.forename: J-P
authors.initials: JP
authors.lastname: Chaput
mesh_terms: D000293:Adolescent; D001290:Attitude; D001828:Body Image / Q000523:psychology*; D015992:Body Mass Index; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D019983:Guideline Adherence / Q000706:statistics & numerical data*; D017408:Guidelines as Topic; D006306:Health Surveys; D006801:Humans; D008297:Male; D009765:Obesity / Q000523:psychology; D009864:Ontario; D050177:Overweight / Q000523:psychology; D010549:Personal Satisfaction; D055815:Young Adult
keywords: Adolescents; Body image; Body weight; Physical activity