title: Associations between organized sports participation and objectively measured physical activity, sedentary time and weight status in youth.
abstract: OBJECTIVE
  The purpose of this study was to examine whether participation in organized sports is related to achieving physical activity recommendations, body mass index (BMI), objectively measured PA intensity and time spent sedentary.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  The sample comprised 973 children and adolescents (427 boys, 546 girls) aged 10-18 years (Mage=14.1±2.4). Organized sport was self-reported. Physical activity and time spent in moderate and vigorous intensity PA (MVPA) and sedentary time was assessed with accelerometers.
  
  
  RESULTS
  More boys (51.3%) than girls (28.3%) reported to be involved in organized sports participation (p<0.001). Those who were engaged in organized sports were more likely to achieve physical activity guidelines (OR=1.64, 95% CI: 1.14-2.35, p<0.01), spent more time in MPA (OR=1.01, 95% CI: 1.01-1.02, p<0.01), VPA (OR=1.09, 95% CI: 1.05-1.13, p<0.001), and MVPA (OR=1.01, 95% CI: 1.01-1.02, p<0.001) than those who did not participate in organized sports. No associations between organised sport participation and time spent sedentary or BMI was observed.
  
  
  CONCLUSIONS
  Engagement in organized sports is related to higher levels of objectively measured MPA, VPA and achieving the recommended levels of MVPA in youth; however participation in sports appears unrelated to time spent sedentary and BMI. Our results suggest that promoting organised sport may increase physical activity of at least moderate intensity in young people.
authors.affiliation: Centro Interdisciplinar de Estudo da Performance Humana, Faculdade de Motricidade Humana, Universidade de Lisboa, Cruz-Quebrada, Portugal. Electronic address: amarques@fmh.utl.pt.
authors.forename: Adilson
authors.initials: A
authors.lastname: Marques
authors.affiliation: Department of Sport Medicine, Norwegian School of Sport Sciences, Norway; MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom.
authors.forename: Ulf
authors.initials: U
authors.lastname: Ekelund
authors.affiliation: Centro Interdisciplinar de Estudo da Performance Humana, Faculdade de Motricidade Humana, Universidade de Lisboa, Cruz-Quebrada, Portugal.
authors.forename: Luís B
authors.initials: LB
authors.lastname: Sardinha
mesh_terms: D061725:Accelerometry; D000293:Adolescent; D015992:Body Mass Index; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity; D011174:Portugal; D057185:Sedentary Behavior; D057566:Self Report; D013177:Sports / Q000706:statistics & numerical data*
keywords: BMI; Portugal; accelerometer; cross-sectional; sport