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Chinese preschoolers’ Physical Activity and Sedentary Behavior Measured by Accelerometry: a Systematicreview

XU Zhen;WANG Yi-di;ZHANG Xiao;WEN Yu-hong;Department of Physical education, Nankai University;China Swimming College, Beijing Sport University;Tianjin Normal University Attached Elementary School;School of Recreational Sports and Tourism, Beijing Sport University;Key Laboratoryof Sportsand Physical Healthofthe Ministry of Education of Beijing Sport University;  
ObjectiveTo systematically reviewthephysicalactivityandsedentarybehavior in Chinesepreschool children using accelerometry. MethodsPubMed, Web of Science, CNKI, and Wanfang databases were searched for terms related to preschoolers' physical activity and sedentary behavior from 1998 to April, 2022. Tworesearchersindependentlyscreenedtheliterature, extracted the data and assessed the quality of eligible studies.Then meta-analysis was performed by Stata16. 0 software. Results Twenty-three studies covering 4449 preschoolers of sixteen urban areas in China were included. The results of meta-analysis showed that the Chinese preschoolers' total physical activity was accounting for 24. 4%(190. 3min/d, 95% CI: 158. 9 ~ 221. 6), moderate-to-vigorous physical activity was accounting for8. 2%(63. 6min/d, 95% CI: 53. 6 ~ 73. 6), and sedentarybehavior was accounting for67. 2%(523. 9min/d, 95% CI: 478. 6 ~ 569. 2). Subgroup analysis showed that girls spent less time on total physical activity and moderate-to-vigorous physical activity than boys, while theywere more sedentary than boys. With increasing age, the moderate-to-vigorous physical activity and sedentarybehavior increased significantly, but the total physical activity did not change. ConclusionThe physical activity of Chinesepreschoolersgenerallymeetstheexistingguidelines, however, they still engage in substantial sedentarybehavior. Girls' physical activity levels have not yet reached the guidelines recommendations.
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