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Maturational timing, physical self-perceptions and physical activity in UK adolescent females: investigation of a mediated effects model

journal contribution
posted on 17.11.2020, 17:02 by Sean P Cumming, Deirdre M Harrington, Melanie J Davis, Charlotte L Edwardson, Trish Gorely, Kamlesh Khunti, Alex V Rowlands, Thomas Yates, Lauren Sherar
Background: Advanced (early) biological maturation may be a risk factor for inactivity among adolescent girls. Aim: To test the mediational effects of body attractiveness and physical self-worth on the relationship between biological maturity and accelerometer assessed moderate-to-vigorous physical activity (MVPA) in a large multi-ethnic sample of girls from the Midlands area in the UK (11–14 years). Subjects and methods: Biological maturity (predicting age at peak height velocity (APHV)); self-perceptions of body attractiveness, physical self-worth, and minutes spent in MVPA were assessed in 1062 females aged 11–14 years. Results: Structural equation modelling using maximum likelihood estimation and boot- strapping procedures supported the hypothesised model. Later maturation predicted higher perceptions of body attractiveness (β = 0.25, p <.001) which, in turn, predicted higher perceptions of physical self-worth (β = 0.91, p <.001) and, significantly higher MVPA (β = 0.22, p <.001). Examination of the bootstrap-generated bias-corrected confidence intervals suggested that perceptions of body attractiveness and physical self-worth partially mediated a positive association between predicted APHV and MVPA (β = 0.05, p <.001). Conclusions: Greater biological maturity (i.e. early maturity) in adolescent girls is associated with less involvement in MVPA and appears to be partly explained by lower perceptions of body attractiveness and physical self-worth. Physical activity interventions should consider girls' perceptions of their pubertal related physiological changes during adolescence, particularly among early maturing girls.

Funding

The study which this analysis is based on was funded by the National Institute for Health Research (NIHR), Public Health Research Programme [13/90/30] Professors Davies and Khunti are NIHR Senior Investigators. University of Leicester authors are supported by the NIHR Leicester-Loughborough Biomedical Research Unit (2012–2017), the NIHR Leicester Biomedical Research Centre (2017–2022) and the Collaboration for Leadership in Applied Health Research and Care (CLAHRC) East Midlands. The Girls Active study was undertaken in collaboration with the Leicester Clinical Trials Unit a UKCRC-registered clinical trials unit in receipt of NIHR CTU support funding and the Youth Sport Trust.

History

School

  • Sport, Exercise and Health Sciences

Published in

Annals of Human Biology

Volume

47

Issue

4

Pages

384 - 390

Publisher

Informa UK Limited, trading as Taylor & Francis Group

Version

AM (Accepted Manuscript)

Rights holder

© Informa UK Limited, trading as Taylor & Francis Group

Publisher statement

This is an Accepted Manuscript of an article published by Taylor & Francis in Annals of Human Biology on 30 September 2020, available online: http://www.tandfonline.com/10.1080/03014460.2020.1784277.

Acceptance date

01/06/2020

Publication date

2020-09-30

Copyright date

2020

ISSN

0301-4460

eISSN

1464-5033

Language

en

Depositor

Dr Lauren Sherar. Deposit date: 16 November 2020

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