Changes in sleep and activity from age 15 to 17 in students with traditional and college-style school schedules.
Changes in sleep and activity from age 15 to 17 in students with traditional and college-style school schedules.
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DOI：
10.1016/j.sleh.2020.04.009
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发表时间：
2020-12
期刊：
影响因子：
4.1
通讯作者：
Johannsson E
中科院分区：
文献类型：
--
作者：
Stefansdottir R;Rognvaldsdottir V;Gestsdottir S;Gudmundsdottir SL;Chen KY;Brychta RJ;Johannsson E
在青春期，睡眠时间和体力活动随着年龄的增长而减少。较早的学校安排可能是导致这些下降的原因之一。这项纵向研究的目的是跟踪冰岛青年从小学到中学的睡眠和活动变化，并比较那些在传统和大学模式的中学入学的学生。我们用手腕活动记录仪测量了145名15岁和17岁的学生的自由睡眠和活动，并用双能x射线吸收仪测量了他们的身体成分，其中58%的学生就读于大学式的学校。采用混合效应模型评估15至17岁之间以及不同学校结构学生之间的差异。15天和17天佩戴活动记录仪的时间分别为7.1±0.4天和6.9±0.4。总的来说，从15岁到17岁，睡眠时间从6.6±0.7小时/夜减少到6.2±0.7小时/夜（p<0.001）。在随访中，传统作息时间的学生在校睡眠时间减少了26分钟/晚（p<0.001），而大学生的睡眠时间没有变化。在随访中，所有学生在上学的晚上都睡得晚，但只有大学生起得晚。睡眠效率和觉醒并没有因作息时间的不同而不同。两性都没有改变体脂率，但在随访中，平均学校日活动量减少了19% (p<0.001)，并且在时间表类型上没有差异。在两年的时间里，青少年减少了每周的睡眠时间和活动，但只有那些继续传统作息的青少年减少了学校晚上的睡眠时间。这表明，个人对学校时间表的更大控制可能会保持这一年龄组的睡眠时间，这在过渡到成年期可能是有益的。
Sleep duration and physical activity decline with age during adolescence. Earlier school schedules may contribute to these declines. The aim of this longitudinal study was to track changes in sleep and activity of Icelandic youth from primary to secondary school and compare students who enrolled in secondary schools with traditional and college-style schedules. We measured free-living sleep and activity with wrist actigraphy and body composition by dual-energy x-ray absorptiometry in 145 students at age 15 and age 17, when 58% attended schools with college-style scheduling. Differences from 15 to 17 and between students of different school structures were assessed with mixed-effect models. Actigraphs were worn for 7.1±0.4 nights at 15 and 6.9±0.4 nights at 17. Overall, sleep duration decreased from 6.6±0.7 h/night to 6.2±0.7 h/night from age 15 to 17 (p<0.001). Students with traditional schedules reduced school-night sleep duration 26 min/night at follow-up (p<0.001), while sleep duration did not change for college-style students. All students went to bed later on school nights at follow-up, but only college-style students rose later. Sleep efficiency and awakenings did not differ by schedule-type. Neither sex changed body fat percentage, but average school-day activity decreased by 19% (p<0.001) on follow-up and did not differ by schedule-type. Over the two-year period, adolescents decreased weekly sleep duration and activity, but only those continuing traditional schedules reduced school-night sleep. This suggests greater individual control of school schedule may preserve sleep duration in this age group, which may be beneficial during the transition into adulthood.
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影响因子：
3.1
作者：
Jakubowski, Karen P.;Hall, Martica H.;Matthews, Karen A.
通讯作者：
Matthews, Karen A.
影响因子：
3.7
作者：
Hrafnkelsdottir SM;Brychta RJ;Rognvaldsdottir V;Gestsdottir S;Chen KY;Johannsson E;Guðmundsdottir SL;Arngrimsson SA
通讯作者：
Arngrimsson SA
影响因子：
4.4
作者：
Hysing, Mari;Pallesen, Stale;Sivertsen, Borge
通讯作者：
Sivertsen, Borge
影响因子：
4.1
作者：
Hirshkowitz, Max;Whiton, Kaitlyn;Hillard, Paula J. Adams
通讯作者：
Hillard, Paula J. Adams
影响因子：
4.3
作者：
Brychta, Robert J.;Arnardottir, Nanna Yr;Chen, Kong Y.
通讯作者：
Chen, Kong Y.