Mediating effect of body mass index between screen behavior and physical activity enjoyment among school-age children

WU Shukun&gt;; SUN Xiaoyu&gt;; LIANG Ruihua&gt;; ZUO Qun&gt;

doi:10.11852/zgetbjzz2022-0819

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Chinese Journal of Child Health Care ›› 2023, Vol. 31 ›› Issue (5) : 470-474. DOI: 10.11852/zgetbjzz2022-0819

Original Articles

Mediating effect of body mass index between screen behavior and physical activity enjoyment among school-age children

WU Shukun¹, SUN Xiaoyu², LIANG Ruihua¹, ZUO Qun¹

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Abstract

Objectives To analyze the relationship between screen behavior and physical activity enjoyment in school-age children, and to explore the mediating effect of body mass index (BMI), so as to provide evidence for formulating strategies to promote physical activity enjoyment in school-age children. Methods A total of 973 students from Grade 1 to 6 were selected from a primary school in Liupanshui city of Guizhou province in June 2021. Screen time on study days and weekends was collected by a self-designed questionnaire, were used to assess the screen behaviors, and the Physical Activity Enjoyment Scale was adopted to investigate physical activity enjoyment. The mediating effect was analyzed by Bootstrap method. Results The average scores of physical activity enjoyment of the 927 students was 18.42±4.01, and their average BMI was (16.90±0.13)kg/m². The proportion of screen time ≤2h/d on study days and weekends was 88.46% and 59.87%, respectively, and the difference was significant(χ²=197.680, P<0.001). Score of screen behaviors on study days and weekends were found to be negatively correlated with physical activity enjoyment(r=-0.286, -0.393, P<0.05), and positively correlated with BMI(r=0.359, 0.462, P<0.01), while there was a negative correlation between BMI and physical activity enjoyment (r=-0.362, P<0.01). The mediating test showed that in addition to directly affecting physical activity enjoyment, screen behavior also had an indirect influence on it through the mediation of BMI with 33.84% of the total effect. Conclusions BMI partially mediates the negative effect of screen behavior on physical activity enjoyment in school-age children. It is recommended that interventions to increase physical activity enjoyment in school-age children need to focus on reducing their screen time and also on enhancing management of their BMI.

Key words

school-age children / physical activity enjoyment / overweight and obesity / screen behavior / body mass index

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WU Shukun>, SUN Xiaoyu>, LIANG Ruihua>, ZUO Qun>. Mediating effect of body mass index between screen behavior and physical activity enjoyment among school-age children[J]. Chinese Journal of Child Health Care. 2023, 31(5): 470-474 https://doi.org/10.11852/zgetbjzz2022-0819

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