Document Detail

Relationship between running velocity of 2 distances and various lactate parameters.
MedLine Citation:
PMID:  19116440     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The purpose of this study was to determine the relationship between various lactate-threshold (LT) definitions and the average running velocity during a 10-km and a 21.1-km time trial (TT). METHODS: Thirteen well-trained runners completed an incremental maximal exercise test, a 10-km TT, and a 21.1-km TT on a motorized treadmill. Blood samples were collected through a venous catheter placed in an antecubital vein. Pearson's correlation coefficients were used to determine the relationship between the running velocity at the different LT definitions and the average running velocity during each TT. A dependent t test was used to determine statistical differences for the mean lactate response between the 2 running distances. RESULTS: The LT(Dmax), the point on the regression curve that yielded the maximal perpendicular distance to the straight line formed by the 2 endpoints, was the LT definition with the highest correlation for both 10-km (r = .844) and 21.1-km TTs (r = .783). The velocity at the LT(Dmax) was not, however, the velocity closest to the performance velocity for either distance. The mean running velocity at each LT was significantly different and tended to overestimate the mean TT performance velocities. The mean lactate concentration during the 10-km TT (3.52 + or - 1.58 mmol) was significantly higher than during the 21.1-km TT (1.86 + or - 0.90 mmol). CONCLUSION: These results indicate that a single LT point cannot be reliably associated with different running distances. Furthermore, these data suggest that a different methodology for estimating the LT that considers individual responses might be required for different running distances.
Charilaos Papadopoulos; J Andrew Doyle; Brian D LaBudde
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sports physiology and performance     Volume:  1     ISSN:  1555-0265     ISO Abbreviation:  -     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2008-12-31     Completed Date:  2009-11-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101276430     Medline TA:  Int J Sports Physiol Perform     Country:  United States    
Other Details:
Languages:  eng     Pagination:  270-83     Citation Subset:  IM    
Dept of Health, Human Performance and Recreation, Central Washington University, Ellensburg, WA 98926-7572, USA.
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MeSH Terms
Anaerobic Threshold*
Biological Markers / blood
Exercise Test
Lactic Acid / blood*
Physical Endurance*
Regression Analysis
Reproducibility of Results
Task Performance and Analysis
Time Factors
Young Adult
Reg. No./Substance:
0/Biological Markers; 50-21-5/Lactic Acid

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

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