| Differences in lactate exchange and removal abilities in athletes specialised in different track running events (100 to 1500 m). | |
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MedLine Citation:
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PMID: 12669256 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to investigate whether track running specialisation could be associated with differences in the ability to exchange and remove lactate. Thirty-four male high-level runners were divided into two groups according to their specialty (100 - 400 m/800 - 1500 m). All performed a 1-min 25.2 km x h -1 event, followed by a 90-min passive recovery to obtain individual blood lactate recovery curves which were fitted to a bi-exponential time function: [La](t) = [La](0) + A 1 (1-e -gamma1t) + A 2 (1-e -gamma2t). The velocity constant gamma 1 which denotes the ability to exchange lactate between the previously worked muscles and blood was higher (p < 0.001) in middle-distance runners than in sprint runners. The velocity constant gamma 2 which reflects the overall ability to remove lactate did not differ significantly between the two groups. gamma 1 was positively correlated with the best performance over 800 m achieved by 16 athletes during the outdoor track season following the protocol (r = 0.55, p < 0.05). In conclusion, the lactate exchange ability seems to play a role on the athlete's capacity to sustain exercise close to 2-min-duration and specifically to run 800 m. |
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Authors:
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C Bret; L Messonnier; J M Nouck Nouck; H Freund; A B Dufour; J R Lacour |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: International journal of sports medicine Volume: 24 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2003 Feb |
Date Detail:
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Created Date: 2003-04-01 Completed Date: 2003-07-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
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Languages: eng Pagination: 108-13 Citation Subset: IM |
Affiliation:
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Laboratoire de Physiologie de l'Exercice, GIP Exercice - EA 645, Faculté de Médecine Lyon-Sud, Chemin du petit Revoyet BP 12, 69 921 Oullins Cedex, France. cbret@univ-lyon.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Adult Humans Lactic Acid / blood* Male Muscle, Skeletal / metabolism* Running / physiology* Track and Field / physiology* |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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