Document Detail

Intermittent hypoxia does not affect endurance performance at moderate altitude in well-trained athletes.
MedLine Citation:
PMID:  20419592     Owner:  NLM     Status:  MEDLINE    
In this study, we examined the effects of a pre-acclimatization programme on endurance performance at moderate altitude using a resting intermittent hypoxia protocol. The time-trial performance of 11 cyclists was determined at low altitude (600 m). Athletes were randomly assigned in a double-blind fashion to the hypoxia or the control group. The pre-acclimatization programme consisted of seven sessions each lasting 1 h in normobaric hypoxia (inspired fraction of oxygen of 12.5%, equivalent to approximately 4500 m) for the hypoxia group (n = 6) and in normoxia (inspired fraction of oxygen of 20.9%) for the control group (n = 5). The time-trials were repeated at moderate altitude (1970 m). Mean power output during the time-trial at moderate altitude was decreased in the hypoxia group (-0.26 +/- 0.11 W x kg(-1)) and in the control group (-0.13 +/- 0.04 W x kg(-1)) compared with at low altitude but did not differ between groups (P = 0.13). Our results suggest that the applied protocol of intermittent hypoxia had no positive effect on endurance performance at moderate altitude. Whether different intermittent hypoxia protocols are advantageous remains to be determined.
Martin Faulhaber; Hannes Gatterer; Thomas Haider; Carson Patterson; Martin Burtscher
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of sports sciences     Volume:  28     ISSN:  1466-447X     ISO Abbreviation:  J Sports Sci     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-04-26     Completed Date:  2010-08-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405364     Medline TA:  J Sports Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  513-9     Citation Subset:  IM    
Department of Sport Science, University of Innsbruck, Innsbruck, Austria.
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MeSH Terms
Anoxia / physiopathology*
Bicycling / physiology*
Double-Blind Method
Exercise Test
Oxygen Consumption / physiology
Physical Endurance / physiology*
Risk Factors
Statistics, Nonparametric
Task Performance and Analysis
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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