Document Detail


Timing the arrival at 2340 m altitude for aerobic performance.
MedLine Citation:
PMID:  17316377     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
B Schuler; J J Thomsen; M Gassmann; C Lundby
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Publication Detail:
Type:  Journal Article     Date:  2007-02-19
Journal Detail:
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:
Created Date:  2007-10-10     Completed Date:  2008-01-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  588-94     Citation Subset:  IM    
Affiliation:
Institute of Veterinary Physiology, Vetsuisse Faculty and Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.
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MeSH Terms
Descriptor/Qualifier:
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:
0/Hemoglobins; 11096-26-7/Erythropoietin

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