Document Detail

Muscle and cerebral oxygenation during exercise performance after short-term respiratory work.
MedLine Citation:
PMID:  21112416     Owner:  NLM     Status:  In-Data-Review    
The purpose of the study was to investigate the effect of 30-min voluntary hyperpnoea on cerebral, respiratory and leg muscle balance between O(2) delivery and utilization during a subsequent constant-power test. Eight males performed a V˙O(2max) test, and two exercise tests at 85% of peak power output: (a) a control constant-power test (CPT), and (b) a constant-power test after a respiratory maneuver (CPT(RM)). Oxygenated (Δ[O(2)Hb]), deoxygenated (Δ[HHb]) and total (Δ[tHb]) hemoglobin in cerebral, intercostal and vastus lateralis were monitored with near-infrared spectroscopy. The performance time dropped ∼15% in CPT(RM) (6:55±2:52min) compared to CPT (8:03±2:33min), but the difference was not statistically significant. The vastus lateralis and intercostal Δ[tHb] and Δ[HHb] were lower in CPT(RM) than in CPT (P≤0.05). There were no differences in cerebral oxygenation between the trials. Thus, respiratory work prior to an exercise test influences the oxygenation during exercise in the leg and respiratory muscles, but not in the frontal cortex.
Michail E Keramidas; Stylianos N Kounalakis; Ola Eiken; Igor B Mekjavic
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Publication Detail:
Type:  Journal Article     Date:  2010-11-26
Journal Detail:
Title:  Respiratory physiology & neurobiology     Volume:  175     ISSN:  1878-1519     ISO Abbreviation:  Respir Physiol Neurobiol     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140022     Medline TA:  Respir Physiol Neurobiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  247-54     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia; Jozef Stefan International Postgraduate School, Ljubljana, Slovenia.
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