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Does light-intensity physical activity moderate the relationship between sitting time and adiposity markers in adolescents?

Contardo Ayala, Ana Maria, Salmon, Jo, Dunstan, David, Arundell, Lauren and Timperio, Anna 2020, Does light-intensity physical activity moderate the relationship between sitting time and adiposity markers in adolescents?, Journal of Sport and Health Science, pp. 1-7, doi: 10.1016/j.jshs.2020.04.002.

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Title Does light-intensity physical activity moderate the relationship between sitting time and adiposity markers in adolescents?
Author(s) Contardo Ayala, Ana MariaORCID iD for Contardo Ayala, Ana Maria orcid.org/0000-0002-4734-6354
Salmon, JoORCID iD for Salmon, Jo orcid.org/0000-0003-2629-9568
Dunstan, DavidORCID iD for Dunstan, David orcid.org/0000-0002-8178-4104
Arundell, LaurenORCID iD for Arundell, Lauren orcid.org/0000-0002-8773-5012
Timperio, Anna
Journal name Journal of Sport and Health Science
Start page 1
End page 7
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2020
ISSN 2095-2546
2213-2961
Keyword(s) Adolescents
Anthropometric measures
Obesity
Physical activity
Sedentary behavior
Sitting time
Summary Background While the relationship between sedentary time and adiposity markers may be independent of moderate-to-vigorous intensity physical activity (MVPA) among adolescents, little is known about the role of light-intensity physical activity (LIPA) in this relationship. The aim of this cross-sectional study was to examine whether device-measured LIPA and MVPA moderate the associations between objectively measured sitting time and adiposity markers (body mass index (BMI)) and waist circumference (WC)) among adolescents. Methods This study included accelerometer and inclinometer data obtained from 219 adolescents (age = 14.9 ± 1.6 years, mean ± SD), collected during 2014 and 2015 in Melbourne, Australia. ActiGraph GT3X accelerometers were used to determine time spent in total-LIPA (101 counts/min to 3.99 metabolic equivalents(METs)), low-LIPA (101–799 counts/min), high-LIPA (800 counts/min to 3.99 METs), and MVPA (≥ 4 METs). The average time spent sitting was obtained from activPAL inclinometers. Anthropometric measures were assessed by trained staff. Interactions between sitting and total-LIPA, low-LIPA, high-LIPA, and MVPA on BMI z-score (zBMI) and WC z-score (zWC), respectively, were examined using linear regression, adjusting for age and sex; and moderation by total-LIPA, low-LIPA, high-LIPA, and MVPA were examined by adding interaction terms. Significant interaction effects were probed by comparing associations at the mean and at 1 SD below and above the mean. Results Total-LIPA significantly moderated the association between sitting time and zBMI, and low-LIPA significantly moderated the association between sitting time and zBMI and zWC. No other associations were found for total-LIPA, high-LIPA, or MVPA. Specifically, at high levels of total-LIPA (+1 SD), there is a negative association between sitting time and zBMI. In addition, at high levels of low-LIPA (+1 SD), there is a negative association between sitting time and zBMI and zWC. Conclusion Associations between sitting and adiposity depended on time spent in total-LIPA and low-LIPA, but not high-LIPA or MVPA. Results suggest that increasing time spent in LIPA may provide protection from the deleterious effects of sitting on adiposity markers among adolescents. Experimental evidence is needed to support these conclusions.
Notes Article in Press
Language eng
DOI 10.1016/j.jshs.2020.04.002
Field of Research 1106 Human Movement and Sports Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30137261

Document type: Journal Article
Collections: Faculty of Health
School of Exercise and Nutrition Sciences
Open Access Collection
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Created: Mon, 25 May 2020, 15:52:10 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.