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Volume and accumulation patterns of physical activity and sedentary time: longitudinal changes and tracking from early to late childhood

Downing, Katherine, Hinkley, T, Timperio, Anna, Salmon, Jo, Carver, A, Cliff, DP, Okely, AD and Hesketh, Kylie 2021, Volume and accumulation patterns of physical activity and sedentary time: longitudinal changes and tracking from early to late childhood, International Journal of Behavioral Nutrition and Physical Activity, vol. 18, no. 1, pp. 1-11, doi: 10.1186/s12966-021-01105-y.

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Title Volume and accumulation patterns of physical activity and sedentary time: longitudinal changes and tracking from early to late childhood
Author(s) Downing, KatherineORCID iD for Downing, Katherine orcid.org/0000-0002-6552-8506
Hinkley, T
Timperio, AnnaORCID iD for Timperio, Anna orcid.org/0000-0002-8773-5012
Salmon, JoORCID iD for Salmon, Jo orcid.org/0000-0002-4734-6354
Carver, A
Cliff, DP
Okely, AD
Hesketh, KylieORCID iD for Hesketh, Kylie orcid.org/0000-0002-2702-7110
Journal name International Journal of Behavioral Nutrition and Physical Activity
Volume number 18
Issue number 1
Article ID 39
Start page 1
End page 11
Total pages 11
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2021
ISSN 1479-5868
1479-5868
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Nutrition & Dietetics
Physiology
Sedentary behaviour
Physical activity
Stability
Longitudinal
Preschool
School-aged
School‐aged
Summary Abstract Background Physical activity (PA) decreases and sedentary time (SED) increases across childhood, with both behaviours tracking. However, no studies have examined how accumulation patterns of PA and SED (i.e., prolonged bouts, frequency of breaks in sedentary time) change and track over time. The aim of this study was to investigate longitudinal changes in and tracking of total volume and accumulation patterns of SED, light-intensity PA (LPA), moderate-intensity PA (MPA), vigorous-intensity PA (VPA) among boys and girls. Methods In 2008/09 (T1), children in HAPPY (3-5y; n = 758) in Melbourne, Australia wore ActiGraph GT1M accelerometers to objectively assess SED, LPA, MPA and VPA. This was repeated at age 6-8y (T2; n = 473) and 9-11y (T3; n = 478). Ten pattern variables were computed: bouts of ≥ 5-, ≥ 10-, ≥ 15- and ≥ 20-min for SED, ≥ 1- and ≥ 5-min for LPA, ≥ 1-min for MPA, ≥ 1- and ≥ 5-min for VPA, and breaks in SED (interruptions of > 25 counts 15 s− 1). Longitudinal mixed models examined changes from T1-3, controlling for T1 age. Generalized estimating equations assessed tracking over the three time points, controlling for T1 age and time between measurements. Analyses were stratified by sex. Results Total volume and bouts of SED and SED breaks increased, while total volume and bouts of LPA decreased for both sexes. There was a small decrease in total volume of MPA for girls, but time spent in ≥ 1-min bouts increased for both sexes. Total volume of VPA increased for both sexes, with time spent in ≥ 1-min bouts increasing for boys only. All volume and pattern variables tracked moderately for boys, except for all SED bouts ≥ 15-min, LPA bouts ≥ 5-min and MPA bouts ≥ 1-min (which tracked weakly). For girls, total SED and SED bouts ≥ 1-min tracked strongly, total volume of LPA, MPA and VPA, ≥ 5- and ≥ 10-min SED bouts, and ≥ 1-min LPA and MPA bouts tracked moderately, and SED breaks, all SED bouts ≥ 15 min, LPA bouts ≥ 5 min and all VPA bouts tracked weakly. Conclusions Patterns of SED and PA change from early to late childhood; with the exception of SED breaks and VPA, changes were detrimental. Total volumes and short bouts tended to track more strongly than longer bouts. Interventions to prevent declines in PA and increases in SED are important from early in life.
Language eng
DOI 10.1186/s12966-021-01105-y
Indigenous content off
Field of Research 11 Medical and Health Sciences
13 Education
HERDC Research category C1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30149563

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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.