The night before night shift: Chronotype impacts total sleep and rapid eye movement sleep during a strategically delayed sleep

Aug 10, 2022Journal of sleep research

How natural sleep timing affects total and dream sleep before a night shift with delayed sleep time

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Abstract

Seventy-two healthy adults participated in a study examining sleep quality across different chronotypes with normally timed and delayed sleep opportunities.

  • Early chronotypes experienced less total sleep with delayed sleep compared to normally timed sleep (p = 0.044).
  • Intermediate and late chronotypes had more rapid eye movement (REM) sleep during delayed sleep than with normally timed sleep (p = 0.013 and p = 0.012 respectively).
  • Wakefulness was higher for all chronotypes during the later hours of the delayed sleep opportunity compared to the start.
  • Chronotype may influence how sleep quality and architecture are affected by sleep timing.

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