Thompson Angela M, Campagna Philip D, Durant Matthew, Murphy René J L, Rehman Laurene A, Wadsworth Laurie A
Department of Human Kinetics, St. Francis Xavier University, NS, Canada.
Int J Pediatr Obes. 2009;4(1):28-35. doi: 10.1080/17477160802170050.
This study compared the accumulated minutes of objectively measured physical activity in 1,790 boys and girls in Grades 3, 7, and 11 classified as healthy weight, at risk of overweight, and overweight.
Height and weight were measured and body mass index calculated. Minutes of sedentary, light, moderate, hard, and very hard physical activity were obtained from a seven-day measurement of physical activity using an accelerometer (Actigraph, mode 7164; MTI).
In Grade 3, boys (p=0.000) and girls (p=0.012) classified as overweight obtained significantly fewer minutes of very hard physical activity compared with their healthy weight counterparts. Boys in Grade 7 considered overweight obtained significantly fewer minutes of hard (p=0.002) and very hard physical activity (p=0.006) compared with boys who were a healthy weight. There were no significant differences in minutes of sedentary, light, moderate, hard, or very hard intensity physical activity in the boys and girls in Grade 11, who were considered a healthy weight, at risk of overweight, or overweight.
Weak and inconsistent support was provided for the notion that boys and girls classified overweight are less physically active than their healthy weight counterparts.
本研究比较了1790名三、七、十一年级被归类为健康体重、超重风险和超重的男女生客观测量的身体活动累计分钟数。
测量身高和体重并计算体重指数。使用加速度计（Actigraph，7164型；MTI）对身体活动进行七天测量，获取久坐、轻度、中度、剧烈和非常剧烈身体活动的分钟数。
在三年级，被归类为超重的男生（p = 0.000）和女生（p = 0.012）与健康体重的同龄人相比，进行非常剧烈身体活动的分钟数明显更少。在七年级，被认为超重的男生与健康体重的男生相比，进行剧烈（p = 0.002）和非常剧烈身体活动（p = 0.006）的分钟数明显更少。在十一年级，被认为是健康体重、有超重风险或超重的男女生在久坐、轻度、中度、剧烈或非常剧烈强度身体活动的分钟数方面没有显著差异。
对于超重的男女生比健康体重的同龄人身体活动更少这一观点，证据支持薄弱且不一致。
