報告書番号

Y05012

タイトル（和文）

短時間休憩後の覚醒度上昇方法に関する実験的検討

タイトル（英文）

An empirical study on mitigation of sleep inertia after a short rest break

概要 （図表や脚注は「報告書全文」に掲載しております）

電力施設等における交替制による監視業務は，単調かつ疲労度が高く，作業中に覚醒度が低下する危険性も予想される。作業中の覚醒度を維持させるには，睡眠を伴う15分程度の短時間休憩が効果的であるが，睡眠には睡眠慣性と呼ばれる眠気が残る現象が伴うため，これが休憩後の作業に悪影響を及ぼすことが危惧される。そこで，休憩後の睡眠慣性を速やかに除去し，後半の作業成績維持に効果的な覚醒度上昇方法を検討した。速やかに覚醒度を上昇できる方法には，ゲーム･ストレッチ･冷たいタオルが有効であり，その後の作業成績を維持させるためには，コーヒー･タオル･ゲーム･大豆ペプチド摂取が有効であった。なお，休憩後は少なくとも10分程度は睡眠慣性除去のための時間を設ける必要があることが示唆された。

概要 （英文）

The purposes of this study is to identify the adequate methods which can enhance the arousal level as soon as possible and maintain the subsequent task performance. Eleven subjects participated in this study. Series of 1-digit addition task on visual display unit were assigned to each subject for 100 min. A rest break was given for 15 min in the middle of the task After the rest, the following 7 methods that were presumed to mitigate sleep inertia were introduced for 15 min: (1) wiping their faces with cold wet towels and getting a breeze from an electric fan (but only for a minute or two), (2) the same as (1) but using cold wet fragrant towels, (3) doing a stretching exercises and radio gymnastic exercises, (4) playing a PC game, (5) taking 100mg of caffeine, (6) the same as (1), and (7) taking 5g of soy peptide. To assess arousal level, electroencephalogram (EEG) was measured, as well as performances and psychological indices. As the results, the following observations were suggested.1)Playing a PC game, doing a stretching exercises, and wiping one’s face with cold wet towels had relieved sleep inertia when the subsequent performance was started.2)Caffeine is the useful method to keep good task performance, while games, cold wet towels and peptide showed as good effects.3)It was revealed as important to take a warm-up period for at least 10 min to relieve sleep inertia after rest breaks. 4)As a preliminary step, the rest methods which could reduce the arousal level immediately and keep stably sleep were investigated using three rest methods before the warm-up method. As the results, listening to music with the fragrant warm towels could help stable sleep and promote a good mood after the rest period in comparison to the no fragrant warm towels. However, It remains an unsettled question how to lead arousal level as lower and sooner as possible into a short break.

報告者

キーワード