Akerstedt T, Torsvall L
Sleep. 1985;8(2):105-9. doi: 10.1093/sleep/8.2.105.
Two hundred eighty-two three-shift workers on rotating schedules filled out a questionnaire on napping behavior. Fifty-one percent were habitual nappers, but these workers rarely napped when working the afternoon shift or on days off. Four patterns were seen: non-napping (49%), morning shift napping (18%), night shift napping (18%), and both night- and morning shift napping (15%). The napping behavior was closely related to the length of the major sleep episode, which depended on the shift worked and on diurnal type; for example, morning shift nappers rated lower on a morningness/eveningness scale and night shift nappers higher. A study repeated 1.5 years later revealed that non-napping was a very stable behavior, whereas napping in many cases had disappeared, particularly among those who had been transferred to day work. The results indicate that for most shift workers napping compensates for sleep loss caused by the temporal displacement of sleep and modified by diurnal type.
282名实行三班倒轮班制的工人填写了一份关于午睡行为的问卷。51%的人有午睡习惯，但这些工人在值下午班或休息日时很少午睡。观察到四种模式：不午睡（49%）、早班午睡（18%）、夜班午睡（18%）以及早晚班都午睡（15%）。午睡行为与主要睡眠时段的时长密切相关，而主要睡眠时段的时长取决于所值的班次和昼夜类型；例如，早班午睡者在晨型/夜型量表上得分较低，夜班午睡者得分较高。1.5年后重复进行的一项研究表明，不午睡是一种非常稳定的行为，而在许多情况下午睡已经消失，尤其是在那些已转为日班工作的人当中。结果表明，对于大多数轮班工人来说，午睡可以弥补因睡眠时间移位以及昼夜类型影响而导致的睡眠不足。
