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dc.contributor.authorPedlar, Charles R.
dc.contributor.authorLane, Andrew M.
dc.contributor.authorLloyd, Juliette C.
dc.contributor.authorDawson, Jean
dc.contributor.authorEmegbo, Stephen
dc.contributor.authorWhyte, Gregory P.
dc.contributor.authorStanely, Neil
dc.date.accessioned2009-04-22T21:06:08Z
dc.date.available2009-04-22T21:06:08Z
dc.date.issued2007
dc.identifier.citationWilderness and Environmental Medicine, 18(2): 127-132
dc.identifier.issn10806032
dc.identifier.doi10.1580/06-WEME-BR-039R1.1
dc.identifier.urihttp://hdl.handle.net/2436/65953
dc.description.abstractObjectives: To investigate sleep parameters and mood profiles of a female explorer traveling solo and unaided to the South Pole during the winter. Methods: During the 44-day expedition, global activity and sleep were assessed using a wrist actigraph (AW) worn on the non-dominant wrist. Mood was assessed using an adapted Profile of Mood States questionnaire. Pre- and post- expedition physiological profiles were conducted to assess body composition, strength and power and aerobic capacity. Results: The AW data revealed decreasing sleep duration throughout the expedition, with an average sleep time of 5 hours (range: 8hr 14mins – 1hr 42mins), with sleep times consistently below 3 hours during the final third of the expedition. Mood responses indicated a progressive reduction in vigour and increase in fatigue. Sleep time was positively related to vigour and inversely related to depression and fatigue, a finding that is consistent with the notion that positive feelings (high vigour and low fatigue) are linked with sleep. Conclusions: This account provides insight to help understand the limits of human tolerance and may be directly applicable when planning future expeditions of this nature.
dc.language.isoen
dc.publisherWilderness Medical Society
dc.relation.urlhttp://www.wemjournal.org/wmsonline/?request=get-document&issn=1080-6032&volume=018&issue=02&page=0127
dc.subjectsleep
dc.subjectmood change
dc.subjectemotion
dc.subjectendurance
dc.subjectfatigue
dc.subjectextreme environment
dc.subjectpolar expedition
dc.subjectHumans
dc.subjectwrist actigraph
dc.titleSleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer.
dc.typeJournal article
dc.identifier.journalWilderness and Environmental Medicine
refterms.dateFOA2018-08-20T16:27:12Z
html.description.abstractObjectives: To investigate sleep parameters and mood profiles of a female explorer traveling solo and unaided to the South Pole during the winter. Methods: During the 44-day expedition, global activity and sleep were assessed using a wrist actigraph (AW) worn on the non-dominant wrist. Mood was assessed using an adapted Profile of Mood States questionnaire. Pre- and post- expedition physiological profiles were conducted to assess body composition, strength and power and aerobic capacity. Results: The AW data revealed decreasing sleep duration throughout the expedition, with an average sleep time of 5 hours (range: 8hr 14mins – 1hr 42mins), with sleep times consistently below 3 hours during the final third of the expedition. Mood responses indicated a progressive reduction in vigour and increase in fatigue. Sleep time was positively related to vigour and inversely related to depression and fatigue, a finding that is consistent with the notion that positive feelings (high vigour and low fatigue) are linked with sleep. Conclusions: This account provides insight to help understand the limits of human tolerance and may be directly applicable when planning future expeditions of this nature.


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