title: Perceived physical competence towards physical activity, and motivation and enjoyment in physical education as longitudinal predictors of adolescents' self-reported physical activity.
abstract: OBJECTIVE
  The aim of the study was to investigate if adolescents' perceived physical competence towards physical activity (PA), and autonomous motivation and enjoyment in physical education (PE) during early adolescence can predict amount and intensity of self-reported physical activity six years later.
  
  
  METHODS
  This study utilized a 6-year longitudinal data set collected within Finnish school settings. Students responded to questionnaires measuring their perceived physical competence towards physical activity, and autonomous motivation and enjoyment in PE during their first year at middle school (Grade 7), and their PA engagement during their last year in high school (Grade 12).
  
  
  METHODS
  A sample of 333 students (200 girls, 133 boys; M age=12.41, years, SD=.27) participated in the study. Perceived physical competence in physical activity was assessed by the sport competence dimension of the Physical Self-Perception Profile, autonomous motivation in PE was assessed by the Sport Motivation Scale and enjoyment in PE by the Sport Enjoyment Scale. Students' self-reported metabolic equivalent (MET) and PA intensity (light [LPA], moderate [MPA], vigorous [VPA]) was calculated from the short form of International Physical Activity Questionnaire.
  
  
  RESULTS
  Perceived physical competence towards physical activity significantly predicted total METs (β=.28), MPA (β=.18) and VPA (β=.29) six years later. Autonomous motivation and enjoyment in PE at Grade 7, however, were not significant predictors of later PA.
  
  
  CONCLUSIONS
  The results of this study support the proposition that self-perception of an individual's abilities arising from interactions with the environment related to PA during early puberty has an influential effect on later PA behaviour.
authors.affiliation: University of Jyväskylä, Department of Sport Sciences, Finland. Electronic address: timo.jaakkola@jyu.fi.
authors.forename: Jaakkola
authors.initials: J
authors.lastname: Timo
authors.affiliation: College of Education, Health and Human Sciences, Department of Health and Sport Sciences, USA.
authors.forename: Yli-Piipari
authors.initials: YP
authors.lastname: Sami
authors.affiliation: College of Education, Victoria University, Australia.
authors.forename: Watt
authors.initials: W
authors.lastname: Anthony
authors.affiliation: University of Jyväskylä, Department of Sport Sciences, Finland.
authors.forename: Liukkonen
authors.initials: L
authors.lastname: Jarmo
mesh_terms: D000293:Adolescent; D015444:Exercise / Q000523:psychology*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009042:Motivation; D010806:Physical Education and Training; D012574:Schools; D012649:Self Concept; D057566:Self Report; D013334:Students; D011795:Surveys and Questionnaires
keywords: Competence; Enjoyment; Motivation; Physical activity; Physical education