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

Webb, Oliver J., Benjamin, Charlotte C., Gammon, Catherine, 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: 24-29. doi:10.1016/j.mhpa.2012.08.005

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Author Webb, Oliver J.
Benjamin, Charlotte C.
Gammon, Catherine
McKee, Heather C.
Biddle, Stuart J. H.
Title Physical activity, sedentary behaviour and physical self-perceptions in adolescent girls: A mediation analysis
Journal name Mental Health and Physical Activity   Check publisher's open access policy
ISSN 1755-2966
Publication date 2013-03
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.mhpa.2012.08.005
Open Access Status
Volume 6
Issue 1
Start page 24
End page 29
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract
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.



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.

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.

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.
Keyword Sedentary Behaviour
Physical activity
Physical self perceptions
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Human Movement and Nutrition Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 03 Dec 2014, 16:15:18 EST by Sandrine Ducrot on behalf of School of Human Movement and Nutrition Sciences