Document Detail

Differences in lactate exchange and removal abilities in athletes specialised in different track running events (100 to 1500 m).
MedLine Citation:
PMID:  12669256     Owner:  NLM     Status:  MEDLINE    
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.
C Bret; L Messonnier; J M Nouck Nouck; H Freund; A B Dufour; J R Lacour
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  International journal of sports medicine     Volume:  24     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-04-01     Completed Date:  2003-07-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  108-13     Citation Subset:  IM    
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.
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MeSH Terms
Adaptation, Physiological
Lactic Acid / blood*
Muscle, Skeletal / metabolism*
Running / physiology*
Track and Field / physiology*
Reg. No./Substance:
50-21-5/Lactic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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