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Delayed acclimatization of the ventilatory threshold in healthy trekkers
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Myers, Stephen D., Biccard, Bruce M., Chan, Colin, Imray, C. (Chris), Wright, Alexander D. and Pattinson, Kyle T. S. (2008) Delayed acclimatization of the ventilatory threshold in healthy trekkers. Wilderness and Environmental Medicine, Vol.19 (No.2). pp. 124-128. doi:10.1580/07-WEME-BR-1271.1 ISSN 1080-6032.
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Official URL: http://dx.doi.org/10.1580/07-WEME-BR-1271.1
Abstract
Objective
To test the hypothesis that acclimatization to high altitude results in an improvement of the ventilatory threshold (VT).
Methods
Eight lowlanders underwent cardiopulmonary exercise testing with a cycle ergometer to determine VT and peak oxygen uptake (Vo2peak) in Coventry, United Kingdom (altitude: 80 m), on arrival in Leh, India (altitude: 3500 m), and after 12 days of acclimatization that included a 5-day high altitude trek up to 4770 m.
Results
Vo2peak fell on arrival at 3500 m and remained depressed at 12 days. VT was depressed on arrival at high altitude and was further depressed at 12 days. VT as a proportion of the Vo2peak was decreased on arrival at high altitude, and after acclimatization, this relationship was further decreased.
Conclusions
Individuals who are sedentary or not participating in regular physical training appear to require a longer period of acclimatization than trained athletes. With the increasing numbers participating in high-altitude trekking and charity climbs of peaks, such as Mt. Kilimanjaro, this information has clinically significant practical implications for those leading or acting as medical advisors.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences > Translational & Experimental Medicine > Metabolic and Vascular Health (- until July 2016) Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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Journal or Publication Title: | Wilderness and Environmental Medicine | ||||
Publisher: | Elsevier Inc. | ||||
ISSN: | 1080-6032 | ||||
Official Date: | June 2008 | ||||
Dates: |
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Volume: | Vol.19 | ||||
Number: | No.2 | ||||
Page Range: | pp. 124-128 | ||||
DOI: | 10.1580/07-WEME-BR-1271.1 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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