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Analysis of sleep on Shuttle missions.

P A Santy1, H Kapanka, J R Davis

  • 1Johnson Space Center, Houston, Texas 77058.

Aviation, Space, and Environmental Medicine
|November 1, 1988
PubMed
Summary

Space Shuttle missions significantly disrupt crew sleep, with dual-shift missions leading to higher sleep medication use. Sleep quality and quantity are impacted, especially during the mission

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Area of Science:

  • Spaceflight physiology
  • Sleep science
  • Human factors in aerospace

Background:

  • Space missions, including Shuttle flights, present unique environmental challenges.
  • These challenges can potentially affect astronaut sleep patterns and overall well-being.
  • Understanding sleep disruption is crucial for crew health and mission success.

Purpose of the Study:

  • To investigate the impact of Shuttle missions on crew sleep quality and quantity.
  • To analyze sleep medication usage across different mission types (single-shift vs. dual-shift).
  • To identify specific mission phases associated with significant sleep pattern disruption.

Main Methods:

  • Debriefing of 58 crewmembers from 9 Shuttle flights (6 single-shift, 3 dual-shift) within 3 days postflight.
  • Analysis of responses to a standard debriefing form focusing on sleep, fatigue, and medication use.
  • Comparison of sleep data between single-shift and dual-shift mission crewmembers.

Main Results:

  • Sleep disruption is a common occurrence during Shuttle missions.
  • Dual-shift mission crewmembers reported higher sleep medication usage (50%) compared to single-shift (19.4%).
  • The most significant sleep pattern impacts were observed on the first (5.7 h) and last (5.6 h) mission days.

Conclusions:

  • Shuttle missions commonly lead to sleep disruption for crewmembers.
  • Mission operational tempo, particularly dual-shift schedules, correlates with increased sleep medication use.
  • Further research is recommended to develop effective strategies for mitigating sleep disruption in spaceflight.

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