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. Attached Files Name Description MIMEType Size Downloads salmon-longitudinalchanges-2019.pdf Published version application/pdf 499.87KB 146 Title Longitudinal changes in sitting patterns, physical activity, and health outcomes in adolescents Author(s) Contardo Ayala, Ana Maria Salmon, Jo-Ann orcid.org/0000-0002-4734-6354 Dunstan, David W orcid.org/0000-0003-2629-9568 Arundell, Lauren orcid.org/0000-0002-8178-4104 Parker, Kate 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 activPAL adolescents 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 Indigenous content off HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2018, The Authors Free to Read? Yes Use Rights Persistent URL http://hdl.handle.net/10536/DRO/DU:30116517 Document type: Journal Article Collections: Faculty of Health Institute for Physical Activity and Nutrition Open Access Collection Related Links Link Description Connect to Elements publication management system Go to link with your DU access privileges   Connect to published version (open access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. 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. Versions Version Filter Type Thu, 10 Jan 2019, 14:05:08 EST Fri, 11 Jan 2019, 04:00:39 EST Wed, 16 Jan 2019, 14:35:44 EST Fri, 12 Apr 2019, 06:03:06 EST Fri, 12 Apr 2019, 10:48:02 EST Fri, 12 Apr 2019, 10:49:55 EST Fri, 12 Apr 2019, 10:50:42 EST Thu, 15 Aug 2019, 11:33:25 EST Thu, 15 Aug 2019, 12:05:09 EST Sat, 25 Jan 2020, 01:30:39 EST Sat, 27 Nov 2021, 01:45:36 EST Filtered Full Citation counts:   Cited 13 times in TR Web of Science Cited 12 times in Scopus Search Google Scholar Access Statistics: 463 Abstract Views, 146 File Downloads  -  Detailed Statistics Created: Thu, 10 Jan 2019, 14:05:08 EST