%0 Journal Article
%T A sleep intervention study comparing effects of sleep restriction and fragmentation on sleep and vigilance and the need for recovery
%J Physiology and behavior
%D 2019
%A Laharnar, Naima
%A Fatek, Joanna
%A Zemann, Maria
%A Glos, Martin
%A Lederer, Katharina
%A Suvorov, Alexander V.
%A Demin, Artem V.
%A Penzel, Thomas
%A Fietze, Ingo
%V ePub
%N ePub
%P ePub-ePub
%X PURPOSE: Sleep deprivation is present not only in sleep disorders but also in numerous high demanding jobs and negatively affects cognition, performance and health. We developed a study design to distinguish the effects and need for recovery of two short-term disturbances - intermittent sleep fragmentation and partial sleep restriction. <br><br>METHODS: The randomized within-subjects design contained two weeks each with a baseline night, an intervention night of either sleep deprivation (5 hours) or sleep fragmentation (light on every hour) and two undisturbed recovery nights. Twenty healthy male participants (mean age: 39.9 ± 7.4 years, mean BMI: 25.5 ± 2.2 kg/m²) underwent polysomnography, a psychomotor vigilance task (PVT), and subjective questions on well-being and sleep efficiency. <br><br>RESULTS: Percentage-wise, the restriction night had significant less wake times, less light sleep (stage 1), less REM sleep, but more deep sleep (stage 3) than the fragmentation night. The restriction week displayed a significant recovery effect regarding these sleep stages. The sleep fragmentation week presented a significant recovery effect regarding sleep onset times. PVT performance showed only a slight recovery effect after sleep restriction. Subjective sleep quality was reduced after both interventions with a significant recovery effect during restriction week only. <br><br>CONCLUSIONS: Short-term sleep restriction presented as a stronger sleep disturbance than short-term intermittent sleep fragmentation, including a stronger need for recovery. Already a one night sleep deprivation had an effect beyond two recovery days. The PVT was not sensitive enough to reveal significant changes. Next, autonomic parameters as possible biomarkers will be investigated.<br><br>Copyright © 2019. Published by Elsevier Inc.<p /> <p>Language: en</p>
%G en
%I Elsevier Publishing
%@ 0031-9384
%U http://dx.doi.org/10.1016/j.physbeh.2019.112794