中学女生的久坐行为与身体成分：少女活动试验
Sedentary activity and body composition of middle school girls: the trial of activity for adolescent girls.
作者信息
Pratt Charlotte, Webber Larry S, Baggett Chris D, Ward Dianne, Pate Russell R, Murray David, Lohman Timothy, Lytle Leslie, Elder John P
机构信息
National Heart, Lung, and Blood Institute, Bethesda, MD, USA.
出版信息
Res Q Exerc Sport. 2008 Dec;79(4):458-67. doi: 10.1080/02701367.2008.10599512.
Abstract
This study describes the relationships between sedentary activity and body composition in 1,458 sixth-grade girls from 36 middle schools across the United States. Multivariate associations between sedentary activity and body composition were examined with regression analyses using general linear mixed models. Mean age, body mass index, and percentage of body fat were 12.0 +/- 0.51, 21.1 kg/m2 +/- 4.8, 28.5 +/- 8.9, respectively. Girls averaged 7.7 +/- 1.2 sedentary hours per day and about 13 hr (approximately 97% of the day) of both sedentary and light activities. Overweight girls were significantly more (13 min; p < .003) sedentary, especially after school (> 2 p.m.; p < .01), and less physically active (p < .0001) than normal weight girls. The study documents small but significant associations between sedentary activity and adiposity.
摘要
本研究描述了来自美国36所中学的1458名六年级女生的久坐活动与身体成分之间的关系。使用一般线性混合模型通过回归分析检验久坐活动与身体成分之间的多变量关联。平均年龄、体重指数和体脂百分比分别为12.0±0.51岁、21.1kg/m²±4.8、28.5±8.9。女孩平均每天久坐7.7±1.2小时，久坐和轻度活动时间约为13小时（约占一天的97%）。超重女孩久坐时间明显更长（13分钟；p<0.003），尤其是放学后（下午2点以后；p<0.01），且比正常体重女孩身体活动更少（p<0.0001）。该研究记录了久坐活动与肥胖之间虽小但显著的关联。
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