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Chronic Sleep Restriction While Minimizing Circadian Disruption Does Not Adversely Affect Glucose Tolerance.

Robin K Yuan1,2, Kirsi-Marja Zitting1,2, Jeanne F Duffy1,2

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Chronic sleep restriction negatively impacts metabolism, but only when combined with circadian disruption. Insufficient sleep alone, without circadian disruption, did not show adverse metabolic effects in healthy adults.

Keywords:
chronic sleep restrictionglucose toleranceinsulin sensitivitymetabolismrecurrent circadian disruption

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Area of Science:

  • Metabolic Health
  • Sleep Science
  • Chronobiology

Background:

  • Insufficient sleep adversely affects metabolism and is linked to circadian disruption.
  • Circadian disruption is increasingly recognized for its negative metabolic effects.
  • Few studies have isolated the metabolic impact of insufficient sleep from circadian disruption.

Purpose of the Study:

  • To evaluate the metabolic effects of chronic sleep restriction (CSR) while controlling for circadian disruption.
  • To compare glycemic control under CSR with minimized circadian disruption versus CSR with recurrent circadian disruption (RCD).

Main Methods:

  • Assessed postprandial glucose and insulin responses to a standard meal in healthy adults (n=9) after 3 weeks of CSR with minimized circadian disruption.
  • Compared results to a previous study using a forced desynchrony (FD) protocol assessing 3 weeks of CSR combined with RCD (n=21).

Main Results:

  • CSR with minimized circadian disruption showed no adverse glycemic effects after 3 weeks.
  • CSR combined with RCD led to significantly elevated postprandial plasma glucose levels (p < 0.0001).

Conclusions:

  • Concurrent circadian disruption is a key factor in the adverse metabolic effects of sleep restriction.
  • Sleep restriction's impact on metabolism may be mediated through its disruption of circadian rhythms.