| Methods for estimating the maximal lactate steady state in trained cyclists. | |
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MedLine Citation:
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PMID: 11404673 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: Maximal lactate steady state (MLSS) is the highest exercise intensity at which blood lactate concentration (HLa) remains stable. In this study, we examined the validity of simulated 5-km and 40-km time trials (TT) as methods for estimating average speed at MLSS in cyclists. METHODS: Nine trained cyclists reported to the laboratory for five to seven exercise trials. Testing included a VO2max test, a simulated 5-km and 40-km TT, and several 30-min MLSS trials. RESULTS: Mean VO2peak was 4.42 +/- 0.13 L.min-1, whereas VO2 at MLSS (N = 8) was 3.54 +/- 0.15 L.min-1, representing 80.1 +/- 4.1% of VO2peak. HR and HLa at MLSS were 174.7 +/- 2.6 b.min-1 and 6.9 +/- 0.8 mM, respectively. MLSS speed was 36.8 +/- 1.0 km.h-1, which corresponded to 92.1 +/- 1.2% of 5 km average speed (AVS5km). Mean AVS, HLa, and HR during the 40-km TT were 36.6 +/- 0.9 km.h-1, 6.3 +/- 0.7 mM, and 174.1 +/- 2.1 b.min-1, respectively, and did not differ from those at MLSS. CONCLUSIONS: Both the (simulated) 5-km and 40-km TT can be used to estimate the MLSS in cyclists. In addition, HLa at MLSS shows a large degree of variation between riders. |
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Authors:
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C R Harnish; T C Swensen; R R Pate |
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Publication Detail:
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Type: Journal Article; Validation Studies |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 33 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2001 Jun |
Date Detail:
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Created Date: 2001-06-13 Completed Date: 2001-08-23 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 1052-5 Citation Subset: IM; S |
Affiliation:
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Department of Exercise Science, School of Public Health, University of South Carolina, Columbia, SC, USA. crharnish@earthlink.net |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicycling / physiology* Energy Metabolism* Female Humans Lactic Acid / blood* Male Sensitivity and Specificity Time Factors |
| 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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