| Physiological responses to cycling for 60 minutes at maximal lactate steady state. | |
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MedLine Citation:
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PMID: 10953063 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Changes in physiological variables during a 60-min continuous test at maximal lactate steady state (MLSS) were studied using highly conditioned cyclists (1 female and 9 males, aged 28.3 +/- 8.1 years). To determine power at MLSS, we tested at 8-min increments and interpolated the power corresponding to a blood lactate value of 4 mmol/L. During the subsequent 60-min exercise at MLSS, we observed a sequential increase of physiological parameters, in contrast to stable blood lactate. Heart rate drifted upward from beginning to end of exercise. This became statistically significant after 30 min. From 10-60 min of exercise, a change of +12.6 +/- 3.2 bpm was noted. Significant drift was seen after 30 min for the respiratory exchange ratio, after 40 min for the rate of perceived exertion using the Borg scale, and after 50 min for % VO(2)max/kg and minute ventilation. This slow component of VO(2)max may be the result of higher recruitment of type II fibers. |
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Authors:
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C Lajoie; L Laurencelle; F Trudeau |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Canadian journal of applied physiology = Revue canadienne de physiologie appliquée Volume: 25 ISSN: 1066-7814 ISO Abbreviation: Can J Appl Physiol Publication Date: 2000 Aug |
Date Detail:
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Created Date: 2001-01-26 Completed Date: 2002-02-21 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9306274 Medline TA: Can J Appl Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 250-61 Citation Subset: IM |
Affiliation:
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Département des sciences de l' activité physique, Université du Québec à Trois-Riviéres, Trois-Riviéres, Québec. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Bicycling / physiology* Exercise Test Exercise Tolerance Female Heart Rate / physiology Humans Lactic Acid / blood* Male Middle Aged Oxygen Consumption / physiology Physical Exertion / 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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