Sleeping-in on the weekend delays circadian phase and increases sleepiness the following week
Sleeping-in on the weekend delays circadian phase and increases sleepiness the following week
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DOI：
10.1111/j.1479-8425.2008.00356.x
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发表时间：
2008-07-01
影响因子：
1.1
通讯作者：
Lack, Leon C.
中科院分区：
文献类型：
--
作者：
Taylor, Amanda;Wright, Helen R.;Lack, Leon C.
许多人倾向于在周末晚些时候睡觉，可能是为了弥补工作周累积的睡眠损失。先前的研究发现，延迟就寝和起床时间（WUT）会导致昼夜节律延迟，随后的情绪和认知功能下降。本研究调查了仅延迟WUT两个周末早晨对昏暗光褪黑激素起始昼夜节律（DLMO）的时间以及睡眠，白天嗜睡和疲劳的影响。在一个重复测量的设计与16名参与者，延迟周末WUT条件（DS）进行了比较，在一个周末，他们保持他们的习惯工作日WUT（HS）。平均而言，DS条件下的参与者将他们的周末WUT推迟了约3小时。与HS条件相比，DS条件下的参与者在周五和周日晚上之间的唾液DLMO显著延迟42分钟。他们还指出，周日晚上的睡眠潜伏期增加了8分钟，而下周一和周二的白天疲劳和嗜睡明显增加。周末睡懒觉似乎会延迟昼夜节律，延迟周日晚上的睡眠，增加白天的困倦和疲劳，即所谓的“周一早晨蓝调”。
Many individuals tend to sleep-in later over the weekend, possibly in an attempt to catch up on accumulated sleep loss from the working week. Previous studies have found that delaying bedtime and waking-up time (WUT) results in a delayed circadian rhythm and a decline in subsequent mood and cognitive functioning. The present study investigated the effect of delaying only WUT for two weekend mornings on the timing of the dim light melatonin onset circadian rhythm (DLMO), as well as sleep, daytime sleepiness and fatigue. In a repeated measures design with 16 participants, the delayed weekend WUT condition (DS) was compared with a weekend in which they kept their habitual weekday WUT (HS). On average, participants in the DS condition delayed their weekend WUT by about 3 h. When compared to the HS condition, participants in the DS condition had a significant delay in salivary DLMO of 42 min between Friday and Sunday nights. They also indicated an 8-min increased sleep onset latency on Sunday night and significantly greater daytime fatigue and sleepiness on Monday and Tuesday of the following week. Sleeping-in late on the weekend appears to have a subsequent cost of delaying circadian rhythm, delaying sleep on Sunday night and increased daytime sleepiness and fatigue, the so-called 'Monday morning blues'.