Clodoré M, Benoit O, Foret J, Touitou Y, Touron N, Bouard G, Auzeby A
Eur J Appl Physiol Occup Physiol. 1987;56(4):403-11. doi: 10.1007/BF00417767.
The present study compares the effects on sleep and the subsequent period of wakefulness of delaying bedtime of 2 h or advancing rising time by 2 h in subjects clearly differentiated by morningness or eveningness in their circadian rhythms. Twelve young healthy good sleepers, six morning types (MT) and six evening types (ET), were selected. The data obtained from the second 24 h (night and day) with delayed bedtime (DB) and advanced rising time (AR) were compared with those obtained in the reference condition (R) with normal sleep schedules. Sleep was recorded polygraphically and rectal temperature was continuously monitored during the nights and during the day following the second night of each condition. Subjective estimations of alertness, performance tasks and urinary steroids were analysed. Early rising appeared to be more disturbing than a late bedtime. The second shortened night showed fewer characteristics of recovery sleep in AR than in DB. The decrease in self rated alertness was a function both of the type of condition (DB or AR) and of the morning-evening typology of the subject. The largest decrease was observed in AR and in the ET subjects. AR also resulted in the most pronounced decrease in performance tasks and in an increase in urinary 17 ketosteroids without changes in the 17 hydroxy-corticosteroids. The effects on rectal temperature were limited to short periods after bedtime in DB and rising time in AR.
本研究比较了在昼夜节律上明显分为晨型或夜型的受试者中，将就寝时间推迟2小时或起床时间提前2小时对睡眠及随后清醒期的影响。选取了12名年轻健康、睡眠良好的受试者，其中6名晨型（MT）和6名夜型（ET）。将推迟就寝时间（DB）和提前起床时间（AR）的第二个24小时（夜间和白天）所获得的数据与正常睡眠时间表的参考条件（R）下所获得的数据进行比较。在每种情况的第二个夜晚后的夜间和白天，用多导睡眠图记录睡眠情况，并持续监测直肠温度。分析了对警觉性、执行任务情况和尿类固醇的主观评估。早起似乎比晚睡更令人不安。在AR组中，第二个缩短的夜晚显示出的恢复睡眠特征比DB组少。自我评定的警觉性下降是条件类型（DB或AR）和受试者早晚类型的函数。在AR组和ET受试者中观察到最大的下降。AR还导致执行任务情况最明显下降，尿17-酮类固醇增加，而17-羟皮质类固醇没有变化。对直肠温度的影响仅限于DB组就寝时间后和AR组起床时间后的短时间内。
