IMPACT OF SLEEP RESTRICTION AND FRAGMENTATION ON OBJECTIVE AND SUBJECTIVE SLEEP QUALITY - AN INTERVENTION STUDY Научная публикация
Конференция |
69th International Astronautical congress 01-05 окт. 2018 , Бремен |
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Сборник | Proceedings of the International Astronautical Congress, IAC Сборник, Бремен.2019. 17469 c. ISBN 9781510881655. РИНЦ |
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Вых. Данные | Год: 2018, | ||||||
Ключевые слова | POLYSOMNOGRAPHY, PVT, SLEEP DEPRIVATION, SLEEP FRAGMENTATION, SLEEP QUALITY, SPACE | ||||||
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Реферат:
Purpose: Nighttime sleep has a physical and mental regeneration function. Sleep restriction, fragmentation, and deprivation are present not only in sleep disorders but also in numerous mentally and physically high demanding jobs (e.g., shift-workers, astronauts). While impaired sleep can lead to an imbalance of the autonomic nervous system and is associated with cardiovascular morbidity and mortality, there is a lack of sensitive biomarkers. The aim of our study was to investigate and compare the effects of short-term sleep fragmentation and sleep restriction including recovery sleep on objective as well as subjective sleep. Methods: The randomized cross-over within-subjects design consisted of 20 healthy male participants (mean age: 39.9 ± 7.4 years, mean BMI: 25.5 ± 2.2 kg/m 2). The protocol included one baseline night, one intervention night of either sleep deprivation (5 hours) or sleep fragmentation (light on every hour) and two recovery nights of undisturbed sleep. Each participant underwent a total of 2 x 4 nights, experiencing both interventions separated by a wash-out phase of at least one week. Measurements for each night included laboratory-based polysomnography, a psychomotor vigilance task (PVT), and subjective questions on well-being and sleep efficiency. Results: The restriction night showed a significant different distribution of sleep stages than the fragmentation night. Percentage-wise, the restriction night had less wake times, less light sleep, less REM sleep, but more deep sleep than the fragmentation night. Only after restriction night, there was also a significant recovery effect regarding sleep stages. During sleep fragmentation, only the sleep onset time showed a significant recovery effect. PVT performance showed only a slight recovery effect after sleep restriction. Subjective sleep data revealed a reduced sleep quality after both interventions with a significant recovery effect after the sleep restriction night. Conclusions: Results indicated that short-term sleep restriction may be a stronger sleep disturbance than short-term and intermittent sleep fragmentation, including a stronger need for recovery. Already a one night sleep deprivation had an effect beyond two recovery days. The PVT did not seem sensitive enough to reveal significant changes. In order to be more conclusive it is advisable to add a second baseline and intervention night to the design. Next, autonomic parameters as possible biomarkers will be investigated. It is planned to test the design with participants of a simulated 4-months isolation experiment in order to extract easily measurable indicators for restorative sleep that may be applied in situations of extreme conditions (e.g. space).
Библиографическая ссылка:
LAHARNAR N.
, FATEK J.
, ZEMANN M.
, GLOS M.
, LEDERER K.
, SUVOROV A.V.
, DEMIN A.V.
, PENZEL T.
, FIETZE I.
IMPACT OF SLEEP RESTRICTION AND FRAGMENTATION ON OBJECTIVE AND SUBJECTIVE SLEEP QUALITY - AN INTERVENTION STUDY
В сборнике Proceedings of the International Astronautical Congress, IAC. 2018. – ISBN 9781510881655.
IMPACT OF SLEEP RESTRICTION AND FRAGMENTATION ON OBJECTIVE AND SUBJECTIVE SLEEP QUALITY - AN INTERVENTION STUDY
В сборнике Proceedings of the International Astronautical Congress, IAC. 2018. – ISBN 9781510881655.
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