Physical activity, sedentary behaviour and physical self-perceptions in adolescent girls: a mediation analysis

Webb, Oliver J. and Benjamin, Charlotte C. and Gammon, Catherine and McKee, Heather C. and Biddle, Stuart J. H. (2013) Physical activity, sedentary behaviour and physical self-perceptions in adolescent girls: a mediation analysis. Mental Health and Physical Activity, 6 (1). pp. 24-29. ISSN 1755-2966

Abstract

Objective: Few studies have examined the relationship between sedentary behaviour (SB) and mental well-being. This study assessed whether SB is associated with physical self-perceptions, independent of participation in moderate-to-vigorous physical activity (MVPA). Previous studies in this area simultaneously entered measures of SB and MVPA as predictors in regression models. In a novel approach, this study used mediation analyses to avoid problems of collinearity between SB and MVPA. Design: Cross-sectional. Setting: School-based. Method: Adolescent females (N = 238) used validated instruments to self-report time spent in SB and MVPA on the previous day, and to provide ratings for physical self-perceptions. Where a self-perception variable was associated with SB, Baron and Kenny's method was used to test if the relationship was mediated by MVPA. Results: There were small direct associations between SB and two self-perceptions, which were not mediated by MVPA: 'sports competence' (-.022) and 'physical conditioning' (-.023). There was also a negative association between SB and perceived 'physical strength', which, by contrast, was mediated by MVPA. Conclusion: Results for selected self-perceptions indicate that SB may be important to aspects of mental well-being independent of MVPA engagement. Future studies should use longitudinal and prospective designs to (a) assess the causality and direction of associations between SB and self-perceptions; (b) explore how individual SBs relate to self-perceptions; and (c) establish if the magnitude of these associations is clinically relevant. © 2012 Elsevier Ltd. All rights reserved.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 11 May 2017 03:54
Last Modified: 11 May 2017 03:54
Uncontrolled Keywords: Physical activity; Physical self-perceptions; Sedentary behaviour; Public Health, Social Medicine and Epidemiology; Neurology and Neurosurgery;
Fields of Research : 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110602 Exercise Physiology
Socio-Economic Objective: C Society > 92 Health > 9299 Other Health > 929999 Health not elsewhere classified
Identification Number or DOI: 10.1016/j.mhpa.2012.08.005
URI: http://eprints.usq.edu.au/id/eprint/31841

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