Document Detail


Is hypoxia training good for muscles and exercise performance?
MedLine Citation:
PMID:  20417346     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Altitude training has become very popular among athletes as a means to further increase exercise performance at sea level or to acclimatize to competition at altitude. Several approaches have evolved during the last few decades, with "live high-train low" and "live low-train high" being the most popular. This review focuses on functional, muscular, and practical aspects derived from extensive research on the "live low-train high" approach. According to this, subjects train in hypoxia but remain under normoxia for the rest of the time. It has been reasoned that exercising in hypoxia could increase the training stimulus. Hypoxia training studies published in the past have varied considerably in altitude (2300-5700 m) and training duration (10 days to 8 weeks) and the fitness of the subjects. The evidence from muscle structural, biochemical, and molecular findings point to a specific role of hypoxia in endurance training. However, based on the available performance capacity data such as maximal oxygen uptake (Vo(2)max) and (maximal) power output, hypoxia as a supplement to training is not consistently found to be advantageous for performance at sea level. Stronger evidence exists for benefits of hypoxic training on performance at altitude. "Live low-train high" may thus be considered when altitude acclimatization is not an option. In addition, the complex pattern of gene expression adaptations induced by supplemental training in hypoxia, but not normoxia, suggest that muscle tissue specifically responds to hypoxia. Whether and to what degree these gene expression changes translate into significant changes in protein concentrations that are ultimately responsible for observable structural or functional phenotypes remains open. It is conceivable that the global functional markers such as Vo(2)max and (maximal) power output are too coarse to detect more subtle changes that might still be functionally relevant, at least to high-level athletes.
Authors:
Michael Vogt; Hans Hoppeler
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Progress in cardiovascular diseases     Volume:  52     ISSN:  1873-1740     ISO Abbreviation:  Prog Cardiovasc Dis     Publication Date:    2010 May-Jun
Date Detail:
Created Date:  2010-04-26     Completed Date:  2010-05-13     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  0376442     Medline TA:  Prog Cardiovasc Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  525-33     Citation Subset:  AIM; IM    
Affiliation:
Department of Anatomy, University of Bern, CH-3012 Bern, Switzerland. michael.vogt@ana.unibe.ch <michael.vogt@ana.unibe.ch>
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MeSH Terms
Descriptor/Qualifier:
Acclimatization*
Altitude*
Altitude Sickness / etiology
Anoxia*
Athletic Performance*
Humans
Muscle, Skeletal / metabolism*
Oceans and Seas
Oxygen Consumption
Physical Education and Training / methods*
Physical Endurance
Physical Fitness

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


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