Longitudinal changes in sitting patterns, physical activity, and health outcomes in adolescents

Contardo Ayala, Ana Maria, Salmon, Jo-Ann, Dunstan, David W, Arundell, Lauren, Parker, Kate and Timperio, Anna 2019, Longitudinal changes in sitting patterns, physical activity, and health outcomes in adolescents, Children, vol. 6, no. 1, pp. 1-10, doi: 10.3390/children6010002.

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Title Longitudinal changes in sitting patterns, physical activity, and health outcomes in adolescents
Author(s) Contardo Ayala, Ana Maria
Salmon, Jo-AnnORCID iD for Salmon, Jo-Ann orcid.org/0000-0002-4734-6354
Dunstan, David W
Arundell, LaurenORCID iD for Arundell, Lauren orcid.org/0000-0002-8178-4104
Parker, Kate
Timperio, AnnaORCID iD for Timperio, Anna orcid.org/0000-0002-8773-5012
Journal name Children
Volume number 6
Issue number 1
Article ID 2
Start page 1
End page 10
Total pages 10
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2019-01
ISSN 2227-9067
Keyword(s) ActiGraph
body mass index
sitting time
waist circumference
Summary This study examined two-year changes in patterns of activity and associations with body mass index (BMI) and waist circumference (WC) among adolescents. Inclinometers (activPAL) assessed sitting, sitting bouts, standing, stepping, and breaks from sitting. ActiGraph-accelerometers assessed sedentary time (SED), light-intensity physical activity (LIPA, stratified as low- and high-LIPA), and moderate-to-vigorous physical activity (MVPA). Anthropometric measures were objectively assessed at baseline and self-reported at follow-up. Data from 324 and 67 participants were obtained at baseline and follow-up, respectively. Multilevel mixed-effects linear regression models examined changes over time, and associations between baseline values and BMI and WC at follow-up. There were significant increases in BMI (0.6 kg/m²) and durations of prolonged sitting (26.4 min/day) and SED (52 min/day), and significant decreases in stepping (-19 min/day), LIPA (-33 min/day), low-LIPA (-26 min/day), high-LIPA (-6.3 min/day), MVPA (-19 min/day), and the number of breaks/day (-8). High baseline sitting time was associated (p = 0.086) with higher BMI at follow-up. There were no significant associations between baseline sitting, prolonged sitting, LIPA, or MVPA with WC. Although changes in daily activity patterns were not in a favourable direction, there were no clear associations with BMI or WC. Research with larger sample sizes and more time points is needed.
Language eng
DOI 10.3390/children6010002
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, the authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30116517

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