Document Detail

The effect of intermittent training in hypobaric hypoxia on sea-level exercise: a cross-over study in humans.
MedLine Citation:
PMID:  12527969     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to examine the effect of intermittent training in a hypobaric chamber on physical exercise at sea level. Over a 10 day period, 16 male triathletes trained for 2 h each day on a cycle ergometer placed in a hypobaric chamber. Training intensity was at 60%-70% of the heart rate reserve. There were 8 subjects who trained at a simulated altitude of 2,500 m, the other 8 trained at sea level. A year later, a cross-over study took place. Baseline measurements were made on a cycle ergometer at sea level, which included an incremental test until exhaustion and a Wingate Anaerobic Test. Altogether, 12 subjects completed the cross-over study. At 9 days after training in hypoxia, significant increases were seen in maximal power output (.W(max))(5.2%), anaerobic mean power (4.1%), and anaerobic peak power (3.8%). A non-significant increase in maximal oxygen uptake (.VO(2max)) of 1.9% was observed. At 9 days after training at sea level, no significant changes were seen in .W(max)(2.1%), .VO(2max) (2.0%), anaerobic mean power (0.2%) and anaerobic peak power (0.2%). When comparing the results of the two training regimes, the anaerobic mean power was the only variable that showed a significantly larger increase as a result of training at altitude. And, although the differences in percentage change between the two training protocols were not significant, they were substantial for as well as for anaerobic peak power. The results of this study indicate that intermittent hypobaric training can improve the anaerobic energy supplying system, and also, to a lesser extent, the aerobic system. It can be concluded that the overall results of the cross-over study showed predominantly improvements in the anaerobic metabolism at variance with the previous study of our own group, where the relative .VO(2max) and .W(max) increased by 7%.
Ingrid J M Hendriksen; Ted Meeuwsen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2002-11-09
Journal Detail:
Title:  European journal of applied physiology     Volume:  88     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-01-15     Completed Date:  2003-07-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  396-403     Citation Subset:  IM    
Royal Netherlands Air Force, Centre for Man and Aviation, Aerospace Physiology Department, Soesterberg, The Netherlands.
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MeSH Terms
Anoxia / physiopathology*
Atmospheric Pressure*
Blood Volume
Case-Control Studies
Cross-Over Studies
Exercise / physiology*
Exercise Test
Hemoglobins / analysis
Physical Education and Training*
Physical Endurance
Reg. No./Substance:

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