| Physiological response to professional road cycling: climbers vs. time trialists. | |
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MedLine Citation:
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PMID: 11071054 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to identify possible physiological differences between professional cyclists who show best performance in hill climbing ("climbers") and those who excel in time trials ("time trialists"). To this end, professional, top-level climbers (C; n=8; age 26 +/- 1yr; height 176.0 +/- 2.0cm; body mass 63.6 +/- 2.2 kg) and time trialists (TT; n=6; 27 +/- 1yr; height 181.6 +/- 1.7 cm; body mass 72.3 +/- 2.3 kg) were required to perform two laboratory exercise tests on a cycle ergometer: a) a maximal exercise test (ramp protocol) and b) a constant load test of 20-min duration at approximately 80% of VO2max. Capillary blood lactate concentration and several gas exchange variables were measured during the maximal tests while determinations made during the submaximal tests also included: pH and bicarbonate concentration [HCO3-] in venous blood, and electromyographic (EMG) recordings from the vastus lateralis muscle to estimate root mean square voltage (rms-EMG) and mean power frequency (MPF). Both the maximal lactate concentration in capillary blood and VO2max were greater (p<0.05) in C than in TT (6.6 +/- 0.9 mM vs. 5.0 +/- 0.4 mM, respectively, and 78.4 +/- 3.2 ml x kg(-1) x min(-1) vs. 70.5 +/- 2.4 ml x kg(-1) x min(-1), respectively). Higher mean venous blood pH and [HCO3-] (p<0.05), rms-EMG (p<0.01) and MPF (p<0.05 at 10 and 15min of exercise and p < 0.01 at 5 and 20 min) were recorded in C throughout the submaximal tests. Our findings suggest that in top-level professional cyclists, climbing performance is mainly related to physiological factors (VO2max normalized for body mass, anaerobicl buffer capacity, motor unit recruitment) whereas time trialists tend to achieve greater absolute power outputs. It would also seem that other "technical" requirements of the sport (i. e. pedaling efficiency probably related to biomechanical factors etc.) may be associated with successful time trial performance. |
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Authors:
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A Lucía; H Joyos; J L Chicharro |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of sports medicine Volume: 21 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2000 Oct |
Date Detail:
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Created Date: 2001-02-23 Completed Date: 2001-03-01 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: GERMANY |
Other Details:
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Languages: eng Pagination: 505-12 Citation Subset: IM |
Affiliation:
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Departamento de Ciencias Morfológicas y Fisiología, Universidad Europea de Madrid, Spain. alejandro.lucia@mrfs.cisa.uem.es |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicarbonates / blood Bicycling / physiology* Electromyography Ergometry Exercise Test Humans Hydrogen-Ion Concentration Lactates / blood Male Pulmonary Gas Exchange / physiology |
| Chemical | |
Reg. No./Substance:
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0/Bicarbonates; 0/Lactates |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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