The effect of bright light on sleepiness among rapid-rotating 12-hour shift workers

Sadeghniiat-Haghighi, Khosro; Yazdi, Zohreh; Jahanihashemi, Hassan; Aminian, Omid

doi:10.5271/sjweh.3086

Cited by 20 publications

(31 citation statements)

References 11 publications

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“…Some studies have found that bright light at work has improved performance, reduced daytime sleepiness, and improved night-time sleep quality in day-workers [ 58 – 60 ]. Likewise for shiftwork the beneficial effect of bright light has been demonstrated in night work, with increased levels of alertness at work [ 58 , 60 ] and a reduction in the circadian misalignment associated with night work [ 39 , 61 – 63 ]. In the present study, the Equatorial rubber tappers had higher natural light exposure than the other workers, due to their outdoor work.…”

Section: Discussionmentioning

confidence: 99%

Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes

et al. 2015

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ObjectivesThis study aimed to investigate the relationship between individual natural light exposure, sleep need, and depression at two latitudes, one extreme with a few hours of light per day during winter, and the other with equal hours of light and darkness throughout the year.MethodsThis cross-sectional study included a sample of Brazilian workers (Equatorial, n = 488 workers) and a Swedish sample (Arctic, n = 1,273).ResultsThe reported mean total natural light exposure per 4-week cycle differed significantly between the Equatorial and Arctic regions. However, shiftworkers from both sites reported similar hours of natural light exposure. Short light exposure was a predictor for insufficient sleep.ConclusionReduced exposure to natural light appears to increase the perception of obtaining insufficient sleep. Arctic workers were more prone to develop depression than Equatorial workers.

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Section: Discussionmentioning

confidence: 99%

Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes

et al. 2015

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“…Administration of melatonin in the evening and the first half of the night will advance the phase of circadian rhythms, whereas, melatonin administration during the morning or at the second half of the night will phase delay. [ 22 23 ]…”

Section: Fatigue Managementmentioning

confidence: 99%

Fatigue management in the workplace

Sadeghniiat-Haghighi¹,

Yazdi²

2015

Ind Psychiatry J

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138

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Workers’ fatigue is a significant problem in modern industry, largely because of high demand jobs, long duty periods, disruption of circadian rhythms, and accumulative sleep debt that are common in many industries. Fatigue is the end result of integration of multiple factors such as time awake, time of day, and workload. Then, the full understanding of circadian biologic clock, dynamics of transient and cumulative sleep loss, and recovery is required for effective management of workplace fatigue. It can be more investigated in a new field of sleep medicine called occupational sleep medicine. Occupational sleep medicine is concerned with maintaining best productivity and safety in the industrial settings. The fatigue risk management system (FRMS) is a comprehensive approach that is based on applying scientific evidence of sleep knowledge to manage workers fatigue. It is developing rapidly in the highly safety demand jobs; especially truck drivers, pilots, and power plant workers. The objective of this review is to explain about fatigue in the workplace with emphasis on its association work performance and errors/accidents. Also, we discussed about different methods of fatigue measurement and management.

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“…However, both drugs have been associated with severe skin reactions, and their long term consequences have not been well established. Theoretically, exposure to bright light during the shift might reduce sleepiness by inhibiting the secretion of the sleep-promoting circadian hormone melatonin, but problems with trial designs have led to inconclusive results 82122. Furthermore, diminished night time levels of melatonin, which also functions as an antioxidant, have been suggested as a cause for increased cancer rates in shift workers 23.…”

Section: What Evidence Is Available Regarding Strategies For Workers mentioning

confidence: 99%

Optimising sleep for night shifts

McKenna

Wilkes

2018

BMJ

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The effect of bright light on sleepiness among rapid-rotating 12-hour shift workers

Cited by 20 publications

References 11 publications

Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes

Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes

Fatigue management in the workplace

Optimising sleep for night shifts

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