The effects of a 120-minute nap on sleepiness, fatigue, and performance during 16-hour night shifts: A pilot study
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- Oriyama Sanae
- Graduate School of Biomedical & Health Sciences, Hiroshima University
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- Miyakoshi Yukiko
- Department of Nursing, Nihon Fukushi University
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- Rahman Md Moshiur
- Graduate School of Biomedical & Health Sciences, Hiroshima University
Bibliographic Information
- Other Title
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- The effects of a 120‐minute nap on sleepiness, fatigue, and performance during 16‐hour night shifts: A pilot study
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Abstract
<p>Objective: To investigate sleepiness, fatigue, and performance following a 120-minute nap during simulated 16-hour night shifts based on subjective and objective assessments.</p><p>Methods: Fourteen females participated in this crossover comparative study. Three experimental nap conditions were used: naps from 22:00 to 00:00 (22-NAP), 00:00 to 02:00 (00-NAP), and 02:00 to 04:00 (02-NAP), respectively. Measurement items were sleep parameters, sublingual temperature, a Visual Analog Scale for sleepiness and fatigue, a single-digit mental arithmetic task (for 10 minutes), and heart rate variability. Participants wore an ActiGraph to estimate their sleep state.</p><p>Results: There was no difference in the sleep parameters at the time of naps among the three conditions. Immediately following a 120-minute nap, sleepiness and fatigue increased, and the number of calculations performed in the single-digit mental arithmetic task decreased in any of the conditions. In particular, immediately after the 02-NAP, fatigue and high-frequency power (HF) were higher than after the 22-NAP. In the early morning (from 05:00 to 09:00), in the 22-NAP, sleepiness and fatigue increased, and performance and sublingual temperature decreased more than in the 00-NAP and 02-NAP. Furthermore, the ratio of errors was significantly lower in the 00-NAP than in the 22-NAP in the early morning.</p><p>Conclusions: A 120-minute nap taken from 22:00 to 02:00 may cause temporary sleepiness after waking, increase fatigue and reduce performance. Greater attention should be given to naps taken at a later time (ie, 02-NAP). In addition, taking a nap starting at 00:00 might decrease the risks of errors in the morning.</p>
Journal
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- Journal of Occupational Health
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Journal of Occupational Health 61 (5), 368-377, 2019-09-20
Japan Society for Occupational Health
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Details 詳細情報について
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- CRID
- 1390001277353395584
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- NII Article ID
- 130007711547
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- ISSN
- 13489585
- 13419145
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- Web Site
- https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F1348-9585.12063
- https://onlinelibrary.wiley.com/doi/pdf/10.1002/1348-9585.12063
- https://onlinelibrary.wiley.com/doi/full-xml/10.1002/1348-9585.12063
- https://onlinelibrary.wiley.com/doi/am-pdf/10.1002%2F1348-9585.12063
- https://search.jamas.or.jp/link/ui/2020205501
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed