Document Detail

Metabolic response during intermittent graded sprint running in moderate hypobaric hypoxia in competitive middle-distance runners.
MedLine Citation:
PMID:  17033792     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to determine whether the metabolic response and running performance during intermittent graded sprint running were affected by moderate hypobaric hypoxia (H; 2,500 m above sea level) in competitive middle-distance runners. Nine male runners performed intermittent graded sprint running until exhaustion, to evaluate the metabolic response and running performance in H and normobaric normoxia (N). The test constructed of incremental (25 m min(-1)) 20 s running bouts (4 degrees inclination) interspaced with 100 s recovery periods. Maximal running speed was not different between conditions [453 (7) m min(-1) vs. 458 (4) m min(-1) in N vs. H]. V(O2) at each speed was lower in H than N (ANOVA; P < 0.05). Although, oxygen deficit (D(O2)) at each speed was not different between N and H (ANOVA; P = 0.1), total accumulated D(O2) in all bouts was significantly higher in H than N [165 (10) ml kg(-1) in N and 173 (10) ml kg(-1) in H]. The ratio of D(O2).V(O2)(-1) was similar in all bouts, but higher in H than N. These results suggest that intermittent graded sprint running performance is not affected by moderate hypobaria despite a reduction in the energy supplied by aerobic metabolism due to a compensatory increase in the energy supplied by the anaerobic metabolism in competitive middle-distance runners.
Takeshi Ogawa; Keiji Hayashi; Masashi Ichinose; Hiroyuki Wada; Takeshi Nishiyasu
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-11
Journal Detail:
Title:  European journal of applied physiology     Volume:  99     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2006-11-22     Completed Date:  2007-05-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  39-46     Citation Subset:  IM    
Institute of Health and Sports Science, University of Tsukuba, Tsukuba City, 305-8574 Ibaraki, Japan.
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MeSH Terms
Anaerobic Threshold / physiology
Anoxia / metabolism*
Energy Metabolism / physiology*
Exercise Test
Oxygen Consumption
Physical Endurance / physiology
Running / physiology*

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