A Laboratory Comparison of Clockwise and Counter-Clockwise Rapidly Rotating Shift Schedules, Part I, Sleep: Final Report
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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
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A Laboratory Comparison of Clockwise and Counter-Clockwise Rapidly Rotating Shift Schedules, Part I, Sleep: Final Report



English
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Details:

  • Alternative Title:
    A laboratory comparison of clockwise and counter-clockwise rapidly rotating shift schedules, part I, sleep.
  • Creators:
  • Corporate Creators:
    Civil Aerospace Medical Institute
  • Corporate Contributors:
    United States. Office of Aerospace Medicine
  • Subject/TRT Terms:
  • Publication/ Report Number:
    DOT/FAA/AM-02/8
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Corporate Publisher:
    Civil Aerospace Medical Institute
  • Abstract:
    INTRODUCTION. Many air traffic control specialists work relatively unique counter-clockwise, rapidly rotating shift schedules. Researchers recommend, however, that if rotating schedules are to be used, they should rotate in a clockwise, rather than a counterclockwise direction. Unfortunately, few studies have examined clockwise and counter-clockwise, rapidly rotating shifts. This study was designed to partially remedy this lack by examining the effects of both types of schedules on sleep duration, timing, and quality. METHODS. Participants (n=28) worked a week of day shifts (0800-1600), followed by two weeks of either a Clockwise (n=14) or Counter-Clockwise (n=14) shiftwork schedule, including early morning (0600-1400), afternoon (1400-2200), and midnight shifts (2200-0600). Participants recorded sleep data in daily logbooks and wore wrist activity sensors to provide an objective source of sleep/wake data. RESULTS. Both groups reported less sleep before the early morning shifts (MClockwise=5.1h; Mcounter-clockwise=5.5h) than before the afternoon shifts (MClockwise=7.5h; Mcounter-Clockwise=7.9h). The Clockwise group reported an average of 7.2h of sleep during the night before the midnight shifts and a nap during the day of 0.9h. In addition to a nighttime sleep of 6.0h, the Counter-Clockwise group also took a nap before the midnight shifts of 2.2h. Objective sleep data and subjective sleep quality ratings are also reported. DISCUSSION. While these data indicate that a longer concentrated sleep period is obtained prior to the midnight shift on the Clockwise rotation schedule, they do not fully support the hypothesis that a clockwise rotation will result in less sleep disruption.
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  • File Type:
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