Hakola T, Härmä M
Finnish Institute of Occupational Health, Helsinki, Finland.
J Hum Ergol (Tokyo). 2001 Dec;30(1-2):315-9.
The aim of this study was to explore the effect of a change in the speed and direction of shift rotation on the sleep and wakefulness of younger and older workers. A continuous three-shift schedule was changed from a slow backward rotating (EEE-MMMNNN-----) to a fast forward rotating system (MMEENN----). Sixteen subjects (mean age 42 years) were studied before and one year after the change in schedule. Two age groups were compared: ten younger men (mean age 35 years) and six older men (mean age 53 years). The effects of the new work schedule were evaluated by a questionnaire (modified SSI), and on-site registrations with an actigraph and sleep log for one shift cycle (10-15 days) before and after the new schedule. After the change in schedule, subjective sleep problems decreased and alertness increased during the morning shifts. The change in schedule influenced sleep differently in the two age-groups. Both the subjective and objective quality of sleep improved among the older workers. The results indicate that a fast forward rotating shift schedule is more suitable for older workers than a slower backward rotating system.
本研究的目的是探讨轮班速度和方向的变化对年轻和年长工人睡眠与清醒状态的影响。连续三班制从缓慢的向后轮班（EEE - MMMNNN-----）改为快速的向前轮班系统（MMEENN----）。在排班变更前和变更后一年对16名受试者（平均年龄42岁）进行了研究。比较了两个年龄组：10名年轻男性（平均年龄35岁）和6名年长男性（平均年龄53岁）。通过问卷（改良的SSI）以及在新排班前后一个轮班周期（10 - 15天）使用活动记录仪和睡眠日志进行现场记录来评估新工作排班的效果。排班变更后，早班期间主观睡眠问题减少，警觉性提高。排班变化对两个年龄组的睡眠影响不同。年长工人的主观和客观睡眠质量均有所改善。结果表明，与较慢的向后轮班系统相比，快速向前轮班制更适合年长工人。
