Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Do bright-light shock exposures during breaks reduce subjective sleepiness in night workers?

Sat Jun 25 09:36:01 2022

(2011) Do bright-light shock exposures during breaks reduce subjective sleepiness in night workers? Sleep and Biological Rhythms. pp. 95-102. ISSN 1446-9235

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Abstract

Night work has many harmful effects on the health, efficiency and safety of workers. This study evaluates the effects of bright-light exposure (BL) on subjective sleepiness during night work. Ninety night workers who have more than a year's experience at a metallurgy production plant volunteered to participate in this clinical pilot study. Workers were divided into two groups and every group was exposed to either bright light (2500-3000 lux) or normal light (300 lux) during break times at night for two consecutive nights. Fifteen-minute breaks were initiated at 22.00 h (before starting work) 24.00 h, 02.00 h and 04.00 h. The range of subjective sleepiness was assessed by the Stanford Sleepiness Scale (SSS) at 23.00 h, 01.00 h, 03.00 h and 05.00 h. We used SPSS 11.5 for data analysis. The result demonstrated that there were significant differences in the rate of sleepiness between the two groups by paired t-test analysis (P < 0.001). These findings suggest that photic stimulation in industrial settings could increase adaptation to night work.

Item Type: Article
Creators:
CreatorsEmail
Karchani, M.UNSPECIFIED
Kakooei, H.UNSPECIFIED
Yazdi, Z.UNSPECIFIED
Zare, M.UNSPECIFIED
Keywords: bright-light exposure shift work sleepiness Stanford Sleepiness Scale human circadian pacemaker shift-work adaptation melatonin maladaptation rhythm phase shiftworkers disorders dark Neurosciences & Neurology
Divisions:
Page Range: pp. 95-102
Journal or Publication Title: Sleep and Biological Rhythms
Journal Index: ISI
Volume: 9
Number: 2
Identification Number: https://doi.org/10.1111/j.1479-8425.2011.00490.x
ISSN: 1446-9235
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/849

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