Cited by 44Sleep and related disordersCircadian rhythm and melatoninSleep and Work-Related Fatigue

No effect of 8‐week time in bed restriction on glucose tolerance in older long sleepers

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ZIELINSKI, MARK R., KLINE, CHRISTOPHER E., KRIPKE, DANIEL F., BOGAN, RICHARD K., YOUNGSTEDT, SHAWN D.·2008·Journal of Sleep Research

Abstract

Summary: The aim of this study was to investigate the effects of 8 weeks of moderate restriction of time in bed (TIB) on glucose tolerance and insulin sensitivity in healthy older self‐reported long sleepers. Forty‐two older adults (ages 50–70 years) who reported average sleep durations of ≥8.5 h per night were assessed. Following a 2‐week baseline, participants were randomly assigned to two 8‐week treatments: either (i) TIB restriction (n = 22), which involved following a fixed sleep schedule in which time in bed was reduced by 90 min compared with baseline; (ii) a control (n = 18), which involved following a fixed sleep schedule but no imposed change of TIB. Sleep was monitored continuously via wrist actigraphy recordings, supplemented with a daily diary. Glucose tolerance and insulin sensitivity were assessed before and following the treatments. Compared with the control treatment, TIB restriction resulted in a significantly greater reduction of nocturnal TIB (1.39 ± 0.40 h versus 0.14 ± 0.26 h), nocturnal total sleep time (TST) (1.03 ± 0.53 h versus 0.40 ± 0.42 h), and 24‐h TST (1.03 ± 0.53 h versus 0.33 ± 0.43 h) from baseline values. However, no significant effect of TIB restriction was found for glucose tolerance or insulin sensitivity. These results suggest that healthy older long sleepers can tolerate 8 weeks of moderate TIB restriction without impairments in glucose tolerance or insulin sensitivity.

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Crossref · 10.1111/j.1365-2869.2008.00673.x

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  • Three studies found no alterations in measures of glucose metabolism.

    “Conversely, three studies [11, 145, 217] found no alterations in measures of glucose metabolism.”

    From Sleep and metabolic function (2012) · cites this paper as [217]

  • Zielinski et al. observed no effect of semi-chronic sleep curtailment on glucose tolerance, as assessed by oral glucose tolerance test, in self-reported older long sleepers.

    “Zielinski et al. assessed the impact of semi-chronic (8 weeks) sleep curtailment on glucose tolerance in self-reported older long sleepers (≥8.5 h/night), compared to a control group; the authors observed no effect of sleep restriction on glucose tolerance, as assessed by OGTT [29].”

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  1. Youngstedt S Kline C Zielinski M Devlin T Kripke D Kumar VM Mallick HN Moderate sleep restriction in older long sleepers Proceedings of the Interim Congress of the World Federation of Sleep Research and Sleep Medicine Society (New Delhi, India, Sept 22–26, 2005): Clinical and Neurophysiological Aspects of Sleep Medimond, Bologna 2005 161 166

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Authors
ZIELINSKI, M. R., KLINE, C. E., KRIPKE, D. F., BOGAN, R. K., & YOUNGSTEDT, S. D.
Affiliations
  • University of South Carolina (US)
  • University of California San Diego (US)
  • SleepMed (US)
Corresponding author
YOUNGSTEDT, SHAWN D.
Venue
Journal of Sleep Research
Publisher
Wiley
Published
2008-11-28
Volume
17
Issue
4
Pages
412-419
ISSN
  • 0962-1105 (ISSN-L)
  • 1365-2869
OpenAlex
W1985289835
Cited by
44
References
45
Citations by year
2025: 2 · 2024: 2 · 2023: 1 · 2022: 5 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 7 · 2012: 4
FWCI
5.91
Type
journal article
Language
en
Open access
Locations
  • Journal of Sleep Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Heart, Lung, and Blood Institute (HL-71560, R01HL071560)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
long sleepers, glucose tolerance, insulin sensitivity, older adults, sleep duration, nocturnal sleep, total sleep time
MeSH terms
Aged, Female, Glucose Tolerance Test, Humans, Disorders of Excessive Somnolence, Male, Mass Screening, Middle Aged, Surveys and Questionnaires, Severity of Illness Index, Sleep Deprivation, Body Mass Index, Polysomnography

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