دورية أكاديمية
Efficacy of intermittent exposure to bright light for treating maladaptation to night work on a counterclockwise shift work rotation
| العنوان: | Efficacy of intermittent exposure to bright light for treating maladaptation to night work on a counterclockwise shift work rotation |
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| المؤلفون: | Heidi M Lammers-van der Holst, James K Wyatt, Todd S Horowitz, John C Wise, Wei Wang, Joseph M Ronda, Jeanne F Duffy, Charles A Czeisler |
| المصدر: | Scandinavian Journal of Work, Environment & Health, Vol 47, Iss 5, Pp 356-366 (2021) |
| بيانات النشر: | Nordic Association of Occupational Safety and Health (NOROSH), 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Public aspects of medicine |
| مصطلحات موضوعية: | shift work, night work, shift worker, circadian phase, melatonin, night shift, bright light, sustained attention, exposure to bright light, counterclockwise shift, Public aspects of medicine, RA1-1270 |
| الوصف: | OBJECTIVES: Rotating shift work is associated with adverse outcomes due to circadian misalignment, sleep curtailment, work-family conflicts, and other factors. We tested a bright light countermeasure to enhance circadian adaptation on a counterclockwise rotation schedule. METHODS: Twenty-nine adults (aged 20–40 years; 15 women) participated in a 4-week laboratory simulation with weekly counterclockwise transitions from day, to night, to evening, to day shifts. Each week consisted of five 8-hour workdays including psychomotor vigilance tests, two days off, designated 8-hour sleep episodes every day, and an assessment of circadian melatonin secretion. Participants were randomized to a treatment group (N=14), receiving intermittent bright light during work designed to facilitate circadian adaptation, or a control group (N=15) working in indoor light. Adaptation was measured by how much of the melatonin secretion episode overlapped with scheduled sleep timing. RESULTS: On the last night shift, there was a greater overlap between melatonin secretion and scheduled sleep time in the treatment group [mean 4.90, standard deviation (SD) 2.8 hours] compared to the control group (2.62, SD 2.8 hours; P=0.002), with night shift adaptation strongly influenced by baseline melatonin timing (r^2=-0.71, P=0.01). While the control group exhibited cognitive deficits on the last night shift, the treatment group’s cognitive deficits on the last night and evening shifts were minimized. CONCLUSIONS: In this laboratory setting, intermittent bright light during work hours enhanced adaptation to night work and subsequent readaptation to evening and day work. Light regimens scheduled to shift circadian timing should be tested in actual shift workers on counterclockwise schedules as a workplace intervention. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0355-3140 1795-990X |
| Relation: | https://www.sjweh.fi/show_abstract.php?abstract_id=3953; https://doaj.org/toc/0355-3140; https://doaj.org/toc/1795-990X |
| DOI: | 10.5271/sjweh.3953 |
| URL الوصول: | https://doaj.org/article/4b44a88269364d0b969dee5695c8a164 |
| رقم الأكسشن: | edsdoj.4b44a88269364d0b969dee5695c8a164 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 03553140 1795990X |
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| DOI: | 10.5271/sjweh.3953 |