Sleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer.
dc.contributor.author | Pedlar, Charles R. | |
dc.contributor.author | Lane, Andrew M. | |
dc.contributor.author | Lloyd, Juliette C. | |
dc.contributor.author | Dawson, Jean | |
dc.contributor.author | Emegbo, Stephen | |
dc.contributor.author | Whyte, Gregory P. | |
dc.contributor.author | Stanely, Neil | |
dc.date.accessioned | 2009-04-22T21:06:08Z | |
dc.date.available | 2009-04-22T21:06:08Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | Wilderness and Environmental Medicine, 18(2): 127-132 | |
dc.identifier.issn | 10806032 | |
dc.identifier.doi | 10.1580/06-WEME-BR-039R1.1 | |
dc.identifier.uri | http://hdl.handle.net/2436/65953 | |
dc.description.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. | |
dc.language.iso | en | |
dc.publisher | Wilderness Medical Society | |
dc.relation.url | http://www.wemjournal.org/wmsonline/?request=get-document&issn=1080-6032&volume=018&issue=02&page=0127 | |
dc.subject | sleep | |
dc.subject | mood change | |
dc.subject | emotion | |
dc.subject | endurance | |
dc.subject | fatigue | |
dc.subject | extreme environment | |
dc.subject | polar expedition | |
dc.subject | Humans | |
dc.subject | wrist actigraph | |
dc.title | Sleep profiles and mood state changes during an expedition to the South Pole: a case study of a female explorer. | |
dc.type | Journal article | |
dc.identifier.journal | Wilderness and Environmental Medicine | |
refterms.dateFOA | 2018-08-20T16:27:12Z | |
html.description.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. |