Photic Resetting in Night-Shift Work: Impact on Nurses' Sleep

May 25, 2012Chronobiology international

How light affects sleep adjustment in night-shift nurses

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Circadian BiologyCircadian Biology on OpenScience ↗PubMed ↗DOI ↗

Abstract

Workers in the treatment group had daytime sleep episodes lasting 7.1 ± 0.1 hours, compared to 6.6 ± 0.2 hours for the control group.

  • Intermittent exposure to full-spectrum bright light during night shifts may improve daytime sleep duration for night-shift workers.
  • Using dark goggles during the morning commute could help maintain the sleep/darkness schedule.
  • The treatment group experienced a larger proportion of melatonin secretion during their daytime sleep.
  • Reestablishing a phase angle similar to that of day-oriented schedules may favor longer daytime sleep episodes.

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