Sleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer.

2.50
Hdl Handle:
http://hdl.handle.net/2436/65953
Title:
Sleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer.
Authors:
Pedlar, Charles R.; Lane, Andrew M.; Lloyd, Juliette C.; Dawson, Jean; Emegbo, Stephen; Whyte, Gregory P.; Stanely, Neil
Abstract:
Objectives: 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.
Citation:
Wilderness and Environmental Medicine, 18(2): 127-132
Publisher:
Wilderness Medical Society
Journal:
Wilderness and Environmental Medicine
Issue Date:
2007
URI:
http://hdl.handle.net/2436/65953
DOI:
10.1580/06-WEME-BR-039R1.1
Additional Links:
http://www.wemjournal.org/wmsonline/?request=get-document&issn=1080-6032&volume=018&issue=02&page=0127
Type:
Article
Language:
en
ISSN:
10806032
Appears in Collections:
Sport Performance

Full metadata record

DC FieldValue Language
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): 127-132en
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.en
dc.language.isoenen
dc.publisherWilderness Medical Societyen
dc.relation.urlhttp://www.wemjournal.org/wmsonline/?request=get-document&issn=1080-6032&volume=018&issue=02&page=0127en
dc.subjectsleepen
dc.subjectmood changeen
dc.subjectemotionen
dc.subjectenduranceen
dc.subjectfatigueen
dc.subjectextreme environmenten
dc.subjectpolar expeditionen
dc.subjectHumansen
dc.subjectwrist actigraphen
dc.titleSleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer.en
dc.typeArticleen
dc.identifier.journalWilderness and Environmental Medicineen
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