Sleep duration and activity levels in Estonian and Swedish children and adolescents
Sleep duration and activity levels in Estonian and Swedish children and adolescents
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DOI：
10.1007/s00421-011-1883-6
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发表时间：
2011-10-01
影响因子：
3
通讯作者：
Sjostrom, Michael
中科院分区：
文献类型：
--
作者：
Ortega, Francisco B.;Ruiz, Jonatan R.;Sjostrom, Michael
我们的目的是研究儿童和青少年的睡眠时间与久坐、中度和剧烈活动时间的关系。样本包括1998-1999年欧洲青年心脏研究中的2 241名（53.5%为女孩）爱沙尼亚和瑞典儿童（9-10岁）和青少年（15-16岁）。睡眠时间是通过自我报告的就寝时间和正常工作日起床时间之间的差异来计算的。久坐时间/身体活动通过加速度计测量（1，462名参与者的有效数据）。青少年符合睡眠建议（> 9小时）的几率低于儿童，瑞典人高于爱沙尼亚人（OR = 0.22，95%CI 0.17-0.27;和1.32，1.07-1.61）。睡眠时间超过10小时的参与者比睡眠时间短的参与者花费更多的时间进行体力活动（所有强度），而久坐活动的时间较少（均P < 0.001）。在对年龄或性成熟（坦纳阶段）进行额外调整后，与体力活动的相关性变得不显著，而与久坐时间的相关性变得边缘显著（年龄和坦纳阶段分别为P = 0.09/0.03）。总之，这些结果并不表明睡眠时间和活动之间的联系，在一个相对较大的样本的儿童和青少年从两个欧洲国家。因此，我们的研究结果并不支持体育活动是睡眠时间短与肥胖之间关系的媒介的常见假设。
We aimed to examine the associations of sleep duration with time spent on sedentary, moderate and vigorous activities in children and adolescents. The sample consisted of 2,241 (53.5% girls) Estonian and Swedish children (9-10 years) and adolescents (15-16 years), from the European Youth Heart Study, in 1998-1999. Sleep duration was calculated by the difference between self-reported bedtime and time for getting up on a normal weekday. Sedentary time/physical activity was measured by accelerometry (valid data on 1,462 participants). Adolescents had lower odds than children, and Swedish higher odds than Estonian, of meeting the sleep recommendations (> 9 h) (OR = 0.22, 95% CI 0.17-0.27; and 1.32, 1.07-1.61, respectively). Participants sleeping longer than 10 h spent more time on physical activities (all intensities) and less time on sedentary activities than those sleeping shorter durations (all P < 0.001). The associations with physical activity became non-significant after additional adjustment for age or sexual maturation (Tanner stages), whereas the associations with sedentary time became borderline significant (P = 0.09/0.03, for age and Tanner, respectively). In conclusion, these results do not suggest a link between sleep durations and activity in a relatively large sample of children and adolescents from two European countries. Consequently, the common assumption that physical activity is a mediator in the relationship between short sleep durations and obesity is not supported by our findings.