TY  - JOUR
PY  - 2019//
TI  - A sleep intervention study comparing effects of sleep restriction and fragmentation on sleep and vigilance and the need for recovery
JO  - Physiology and behavior
A1  - Laharnar, Naima
A1  - Fatek, Joanna
A1  - Zemann, Maria
A1  - Glos, Martin
A1  - Lederer, Katharina
A1  - Suvorov, Alexander V.
A1  - Demin, Artem V.
A1  - Penzel, Thomas
A1  - Fietze, Ingo
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - 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>
LA  - en
SN  - 0031-9384
UR  - http://dx.doi.org/10.1016/j.physbeh.2019.112794
ID  - ref1
ER  -