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| The comparative study of physical activity levels between overweight & obesity preschoolers and preschoolers with normal BMI |
| 1.Dongcheng maternal and child health and family planning service center，district, Beijing, 100000; 2.Beijing institute of pediatrics,Beijing key laboratory of child development and nutrition |
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Abstract Objective: To compare the physical activity levels between overweight & obesity preschoolers and preschoolers with normal BMI, so as to provide evidence for the exercise and health intervention of the preschoolers. Methods: Children aged 4-6 years old were selected from 2-3 kindergartens in Dongcheng district of Beijing. The height and weight of these children were measured by Seca portable scale and height meter. The ActiGraph GT9X accelerometer was worn by the preschoolers for 3 consecutive days to measure their levels of activity. Physical activity (PA) logs were recorded by kindergarten teachers and parents. SAS9.4 was used for statistical analysis. Results: A total of 299 effective data were collected. According to WHO standards, 24.7% (74 preschoolers) were overweight or obese. The average daily physical activity time was 3.3±0.7 hours, the average daily time for middle to vigorous activity was 1.6±0.5 hours, and the average daily screen time for preschoolers was 0.6±0.4 hours. The PA time and the daily screen time of overweight and obese preschoolers were significant higher than those of preschoolers with normal BMI (P<0.05). Conclusion: Preschoolers need more exercise and less screen time, especially for those overweight or obese preschoolers.
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