| Timing the arrival at 2340 m altitude for aerobic performance. | |
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MedLine Citation:
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PMID: 17316377 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study tested the hypothesis that maximal oxygen uptake (VO(2max)) and performance increase upon altitude acclimatization at moderate altitude. Eight elite cyclists were studied at sea level, and after 1 (Day 1), 7 (Day 7), 14 (Day 14) and 21 (Day 21) days of exposure to 2340 m. Capillary blood samples were taken on these days before performing two consecutive maximal exercise trials. Acclimatization increased hemoglobin concentration and arterial oxygen content. On Day 1, VO(2max) and time to exhaustion (at 80% of sea-level maximal power output) decreased by 12.8% (P<0.05) and 25.8% (P<0.05), respectively, compared with the corresponding sea-level values. Subsequently, these parameters increased by 3.2% (P<0.05) and 6.0% (P<0.05) from Days 1 to 7, by 4.8% (P<0.05) and 5.7% (P<0.05) from Days 7 to 14, followed by 0.7% (P>0.05) and 1.4% (P>0.05) from Days 14 to 21, respectively. These data suggest that endurance athletes competing at altitudes around 2340 m should expose themselves to this altitude at least 14 days before competition. |
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Authors:
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B Schuler; J J Thomsen; M Gassmann; C Lundby |
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Publication Detail:
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Type: Journal Article Date: 2007-02-19 |
Journal Detail:
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Title: Scandinavian journal of medicine & science in sports Volume: 17 ISSN: 0905-7188 ISO Abbreviation: Scand J Med Sci Sports Publication Date: 2007 Oct |
Date Detail:
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Created Date: 2007-10-10 Completed Date: 2008-01-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9111504 Medline TA: Scand J Med Sci Sports Country: Denmark |
Other Details:
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Languages: eng Pagination: 588-94 Citation Subset: IM |
Affiliation:
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Institute of Veterinary Physiology, Vetsuisse Faculty and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization Adult Altitude* Anoxia Anthropometry Bicycling / physiology* Doping in Sports Erythropoietin Exercise / physiology* Hemoglobins* Humans Male Muscle Contraction / physiology* Muscle, Skeletal / physiology* Physical Endurance / physiology* Prospective Studies Task Performance and Analysis Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobins; 11096-26-7/Erythropoietin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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