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Longitudinal levels and bouts of objectively measured sedentary time among young Australian children in the HAPPY study

journal contribution
posted on 01.03.2016, 00:00 authored by V Carson, Jo SalmonJo Salmon, David CrawfordDavid Crawford, Trina Hinkley, Kylie HeskethKylie Hesketh
Objectives - To examine differences in sedentary time and bouts during and outside of childcare/school periods, and changes in sedentary time and bouts over 1-year among children who remained in childcare (childcare subsample) and among those who transitioned to school (school transition subsample).

Design - Longitudinal study.

Methods - Results are based on 177 children aged 3–5 years at baseline from the Healthy Active Preschool and Primary Years study in Melbourne, Australia. Sedentary time and sedentary bouts (1–4, 5–9, ≥10 min) for total days and during/outside of childcare/school on weekdays were accelerometer-derived at baseline (2008) and 1-year follow-up (2009), when 57% of participants had transitioned to school. Repeated-measures ANCOVAs adjusting for wear time were conducted.

Results - Compared to the outside of childcare/school period, children in the school transition subsample spent more time (0.5 min/day or 0.9% wear time) in ≥10 min sedentary bouts at baseline, participated in 26 more min/day of sedentary time at follow-up, and all participants spent less time (2–16 min/day or 2–3% of wear time) in 5–9 min sedentary bouts at baseline and follow-up during the childcare/school period (P < 0.05). Increases in sedentary time (34–54 min/day or 2–3% wear time) and time spent in 1–4 min sedentary bouts (18–29 min/day or 1–2% of wear time) were observed from baseline to follow-up in both the total sample and school transition sub-sample, for total days and during the childcare/school period (P < 0.05).

Conclusions - School transition was marked by increased sedentary time. School practices, policies, and environments to reduce sedentary time should be explored.

History

Journal

Journal of science and medicine in sport

Volume

19

Issue

3

Pagination

232 - 236

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1440-2440

eISSN

1878-1861

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2016, Elsevier