Document Detail


The lactate minimum test for cycling: estimation of the maximal lactate steady state.
MedLine Citation:
PMID:  12180316     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study evaluated the reliability and validity of the lactate minimum test (LMT), an incremental test given after lactic acidosis was induced by sprint exercise. This test is purported to accurately estimate the intensity of exercise at which the transport of lactate into and out of the blood is in equilibrium (maximal lactate steady state or MLSS) and should be a good predictor of endurance performance. Fourteen athletes (mean age 27.2 +/- 3.7 yrs) completed the following on Kreitler rollers: (a) two 20-km time-trials (35.1 +/- 3.3 and 35.7 +/- 3.5 km.hr-1, p < .05); (b) two LMTs yielding lactate minimum speeds (LMS) of 33.6 +/- 3.4 and 33.4 +/- 3.1 km.hr-1 (p > 0.6); and (c) four constant intensity rides, at speeds bracketing the LMS. At 33.5 +/- 3.1 km.hr-1 plasma lactate concentration decreased 0.4 +/- 1.6 mM from 10 to 30 min. Plasma lactate increased 1.6 +/- 0.7 mM while riding 0.9 +/- 0.9 km.hr-1 faster. The LMT is a reliable (r2 = 0.904) and valid method to predict MLSS and a good predictor of endurance performance (LMT vs. 20-km time-trial, r2 = 0.86).
Authors:
Brian R MacIntosh; Shane Esau; Krista Svedahl
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Canadian journal of applied physiology = Revue canadienne de physiologie appliquée     Volume:  27     ISSN:  1066-7814     ISO Abbreviation:  Can J Appl Physiol     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-08-15     Completed Date:  2002-12-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9306274     Medline TA:  Can J Appl Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  232-49     Citation Subset:  IM    
Affiliation:
Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB.
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MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling / physiology*
Exercise / physiology*
Exercise Test*
Female
Humans
Lactates / blood*
Male
Physical Endurance / physiology*
Reproducibility of Results
Chemical
Reg. No./Substance:
0/Lactates

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


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