title: The association between past and current physical activity and depressive symptoms in young adults: a 10-year prospective study.
abstract: OBJECTIVE
  The objectives of this study were to assess (1) the longitudinal associations of past moderate-to-vigorous physical activity (MVPA) and involvement in team sports during secondary school with depressive symptoms in early adulthood, and (2) the cross-sectional associations of current MVPA and involvement in team sports with depressive symptoms during young adulthood.
  
  
  METHODS
  Data were drawn from the Nicotine Dependence in Teens study, which is an ongoing prospective cohort study of 1293 adolescents aged 12-13 years at baseline (52% female). Data analyses involved latent growth curve modeling and multiple hierarchical linear regression models.
  
  
  RESULTS
  Current MVPA (β = -0.12), but not past MVPA, participation was significantly negatively related to depressive symptoms during young adulthood (P < .05). Both current and past involvement in team sports were significantly negatively related to depressive symptoms (β ≥ -0.09; P < .05); however, these associations were no longer significant (P = .08) when covariates were controlled for.
  
  
  CONCLUSIONS
  Findings provide insight about the unique associations between the timing and type of physical activity and depressive symptoms, suggesting that physical activity within team sport contexts should be encouraged so that young adults may experience less depressive symptoms.
authors.affiliation: School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada. jennifer.brunet@uottawa.ca
authors.forename: Jennifer
authors.initials: J
authors.lastname: Brunet
authors.forename: Catherine M
authors.initials: CM
authors.lastname: Sabiston
authors.forename: Michael
authors.initials: M
authors.lastname: Chaiton
authors.forename: Tracie A
authors.initials: TA
authors.lastname: Barnett
authors.forename: Erin
authors.initials: E
authors.lastname: O'Loughlin
authors.forename: Nancy C P
authors.initials: NC
authors.lastname: Low
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: O'Loughlin
mesh_terms: D000293:Adolescent; D002648:Child; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology* / Q000517:prevention & control / Q000523:psychology*; D015444:Exercise / Q000502:physiology / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity; D015999:Multivariate Analysis; D011446:Prospective Studies; D011792:Quebec / Q000453:epidemiology; D012574:Schools; D012959:Socioeconomic Factors; D013177:Sports; D013997:Time Factors