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Physical activity and depression in adolescents: cross-sectional findings from the ALSPAC cohort

Abstract

Purpose  

Few studies have examined the association between physical activity (PA), measured objectively, and adolescent depressive
symptoms. The aim of this study was to determine whether there is an association between objective measures of PA (total PA
and time spent in moderate and vigorous PA (MVPA)) and adolescent depressive symptoms.

Methods  

Data on 2,951 adolescents participating in ALSPAC were used. Depressive symptoms were measured using the self-report Mood
and Feelings Questionnaire (MFQ) (short version). Measures of PA were based on accelerometry. The association between PA and
MFQ scores was modelled using ordinal regression.

Results  

Adolescents who were more physically active (total PA or minutes of MVPA) had a reduced odds of depressive symptoms [ORadj total PA (tertiles): medium 0.82 (95% CI: 0.69, 0.97); high 0.69 (95% CI: 0.57, 0.83)]; ORadj per 15 min MVPA: 0.92 (95% CI: 0.86, 0.98). In a multivariable model including both total PA and the percentage of time spent
in MVPA, total PA was associated with depressive symptoms (ORadj total PA (tertiles): medium 0.82 (95% CI: 0.70, 0.98); high 0.70 (95% CI: 0.58, 0.85) but the percentage of time spent in
MVPA was not independently associated with depressive symptoms [ORadj MVPA (tertiles) medium 1.05 (95% CI: 0.88, 1.24), high 0.91 (95% CI: 0.77, 1.09)].

Conclusions  

The total amount of PA undertaken was associated with adolescent depressive symptoms, but the amount of time spent in MVPA,
once total PA was accounted for, was not. If confirmed in longitudinal studies and randomised controlled trials, this would
have important implications for public health messages.

  • Content Type Journal Article
  • Category Original Paper
  • Pages 1-11
  • DOI 10.1007/s00127-011-0422-4
  • Authors
    • Nicola J. Wiles, Academic Unit of Psychiatry, School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol, BS8 2BN UK
    • Anne M. Haase, Centre for Exercise, Nutrition and Health, School of Policy Studies, University of Bristol, Bristol, UK
    • Debbie A. Lawlor, MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, UK
    • Andy Ness, School of Oral and Dental Science, University of Bristol, Bristol, UK
    • Glyn Lewis, Academic Unit of Psychiatry, School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol, BS8 2BN UK
    • Journal Social Psychiatry and Psychiatric Epidemiology
    • Online ISSN 1433-9285
    • Print ISSN 0933-7954
Posted in: Journal Article Abstracts on 08/13/2011 | Link to this post on IFP |
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