Effects of partial circadian adjustments on sleep and vigilance quality during simulated night work

Journal of Sleep Research
Simon ChapdelaineMarie Dumont

Abstract

In most situations, complete circadian adjustment is not recommended for night workers. With complete adjustment, workers experience circadian misalignment when returning on a day-active schedule, causing repeated circadian phase shifts and internal desynchrony. For this reason, partial circadian realignment was proposed as a good compromise to stabilize internal circadian rhythms in night shift workers. However, the extent of partial circadian adjustment necessary to improve sleep and vigilance quality is still a matter of debate. In this study, the effects of small but statistically significant partial circadian adjustments on sleep and vigilance quality were assessed in a laboratory simulation of night work to determine whether they were also of clinical significance. Partial adjustments obtained by phase delay or by phase advance were quantified not only by the phase shift of dim light salivary melatonin onset, but also by the overlap of the episode of melatonin production with the sleep-wake cycle adopted during simulated night work. The effects on daytime sleep and night-time vigilance quality were modest. However, they suggest that even small adjustments by phase delay may decrease the accumulation of sleep debt, whereas...Continue Reading

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Citations

Sep 16, 2014·Chronobiology International·Marie Dumont, Jean Paquet
Sep 1, 2016·Chronobiology International·Markus CanazeiElisabeth M Weiss
Jun 20, 2017·Biological Research for Nursing·Claudia M Hunter, Mariana G Figueiro
Nov 17, 2017·Chronobiology International·Shunsuke NagashimaTomoko Wakamura
Nov 15, 2018·Critical Care : the Official Journal of the Critical Care Forum·John E GriepentrogMatthew R Rosengart
Feb 5, 2021·International Journal of Environmental Research and Public Health·Tae-Won Jang
Apr 4, 2021·International Journal of Environmental Research and Public Health·Giusi BriguglioConcettina Fenga

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