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DTSTART:19700308T020000
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BEGIN:VEVENT
DTSTAMP:20251016T135139Z
LOCATION:Grand C/D North
DTSTART;TZID=America/Chicago:20251016T113000
DTEND;TZID=America/Chicago:20251016T115000
UID:HFESAM_ASPIRE 2025_sess193_LECT209@linklings.com
SUMMARY:Salivary Cortisol Levels in Sailors Before and After Fixed vs. Rot
 ating Watchkeeping Schedules
DESCRIPTION:Johanna Abendroth, Stefan Röttger, and Theresa Kohn (German Na
 val Institute of Maritime Medicine); Thomas Jacobsen (Helmut-Schmidt-Unive
 rsity); and Panagiotis Matsangas and Nita Shattuck (Naval Postgraduate Sch
 ool)\n\nTiming, duration, and assignment of sailors to watch sections are 
 defined in watchkeeping schedules, that not only depend on the number of a
 vailable personnel, but in recent years are also informed by consideration
 s based on humans’ circadian rhythm. One key element in designing watchkee
 ping schedules pertains to rotation. In rotating watchkeeping schedules, s
 ailors stand watch at different times every day. Consequently, from time t
 o time all watchstanders will be required to stand watch and remain awake 
 at their biological nadir or circadian low point (i.e., midnight to 4 a.m.
 ). This daily rotation requires sailors to adapt to different times for wo
 rk and rest each day. In contrast, fixed watchkeeping schedules allow sail
 ors to maintain to consistent work and rest times. The problem with fixed 
 watchkeeping schedules, however, is, that sailors on the night watch must 
 continue to stand watch during their circadian low periods. In the present
  study, we aimed to increase the understanding of whether, when, and for w
 hom a rotation in watchkeeping times might be beneficial. Results on saliv
 ary cortisol samples collected in sea trials with rotating and fixed three
 -section watchkeeping schedules will be discussed.\n\nTrack: Health Care\n
 \nSession Chair: Shiyu Deng (Virginia Polytechnic Institute and State Univ
 ersity)\n\n
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