| Local and systemic effects on blood lactate concentration during exercise with small and large muscle groups. | |
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MedLine Citation:
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PMID: 16642364 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To evaluate the relationship between lactate release and [lac](art) and to investigate the influence of the catecholamines on the lactate release, 14 healthy men [age 25+/-3 (SE) year] were studied by superimposing cycle on forearm exercise, both at 65% of their maximal power reached in respective incremental tests. Handgrip exercise was performed for 30 min at 65% of peak power. In addition, between the tenth and the 22nd minute, cycling with the same intensity was superimposed. The increase in venous lactate concentration ([lac](ven)) (rest: 1.3+/-0.4 mmol.l(-1); 3rd min: 3.9+/-0.8 mmol.l(-1)) begins with the forearm exercise, whereas arterial lactate concentration ([lac](art)) remains almost unchanged. Once cycling has been added to forearm exercise (COMB), [lac](art) increases with a concomitant increase in [lac](ven) (12th min: [lac](art), 3.2+/-1.3 mmol.l(-1); [lac](ven), 5.7+/-2.2 mmol.l(-1)). A correlation between oxygen tension (P(v)O(2)) and [lac](ven) cannot be detected. There is a significant correlation between [lac](art) and norepinephrine ([NE]) (y=0.25x+1.2; r=0.815; p<0.01) but no correlation between lactate release and epinephrine ([EPI]) at moderate intensity. Our main conclusion is that lactate release from exercising muscles at moderate intensities is neither dependent on P(v)O(2) nor on [EPI] in the blood. |
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Authors:
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R Chudalla; S Baerwalde; G Schneider; N Maassen |
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Publication Detail:
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Type: Clinical Trial; Journal Article Date: 2006-04-27 |
Journal Detail:
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Title: Pflügers Archiv : European journal of physiology Volume: 452 ISSN: 0031-6768 ISO Abbreviation: Pflugers Arch. Publication Date: 2006 Sep |
Date Detail:
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Created Date: 2006-09-01 Completed Date: 2007-01-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0154720 Medline TA: Pflugers Arch Country: Germany |
Other Details:
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Languages: eng Pagination: 690-7 Citation Subset: IM |
Affiliation:
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Sports and Exercise Physiology, Medical School Hannover, Carl-Neubergstrasse 1, 30625 Hannover, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicycling / physiology Blood Gas Analysis Exercise / physiology* Forearm / physiology Heart Rate / physiology Humans Lactic Acid / blood* Male Muscle, Skeletal / physiology* Norepinephrine / blood Oxygen / blood Oxygen Consumption / physiology Sympathetic Nervous System / physiology Weight Lifting / physiology |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid; 51-41-2/Norepinephrine; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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