Cinetique de la consommation d'oxygene chez le cycliste amateur
Aims: Study was to analyze the relationship between oxygen uptake and power output in amateur cyclists before and after threshold corresponding to a blood lactate concentration of 4mmol/l. Methods: We evaluated 109 subjects and they were divided according to age, cycling speciality, level and period...
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Veröffentlicht in: | Science & sports 2008-12, Vol.23 (6), p.292-298 |
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creator | Romeur, J P Lounana, J Soudain-Pineau, M Medelli, J Joly, P |
description | Aims: Study was to analyze the relationship between oxygen uptake and power output in amateur cyclists before and after threshold corresponding to a blood lactate concentration of 4mmol/l. Methods: We evaluated 109 subjects and they were divided according to age, cycling speciality, level and period. Each subject performed an incremental exercise test (50W per 3min) until exhaustion on an electromagnetically braked cycloergometer. Gas exchange data were continuously analyzed and recorded using an automated breath by breath system. Mean values of oxygen uptake were taken during the last minute of each stage in order to build and calculate the regression equations. Results: The total sample presents an oxygen-kinetic deflection after lactate threshold, with the slope before threshold significantly higher (P |
doi_str_mv | 10.1016/j.scispo.2008.03.001 |
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Methods: We evaluated 109 subjects and they were divided according to age, cycling speciality, level and period. Each subject performed an incremental exercise test (50W per 3min) until exhaustion on an electromagnetically braked cycloergometer. Gas exchange data were continuously analyzed and recorded using an automated breath by breath system. Mean values of oxygen uptake were taken during the last minute of each stage in order to build and calculate the regression equations. Results: The total sample presents an oxygen-kinetic deflection after lactate threshold, with the slope before threshold significantly higher (P<0.001) than the slope after threshold. This indicates an absence of linearity. Considering the level, the slope and intercept before threshold of the national group presented significantly lower values than regional cyclists. For speciality, the slope before threshold is significantly lower in mountain bike group compared to road. Slope's analyse before and after lactate threshold could present complementary criteria for a good discrimination in comparison with classic concepts used during an incremental exhaustive test.</description><identifier>ISSN: 0765-1597</identifier><identifier>DOI: 10.1016/j.scispo.2008.03.001</identifier><language>fre</language><ispartof>Science & sports, 2008-12, Vol.23 (6), p.292-298</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Romeur, J P</creatorcontrib><creatorcontrib>Lounana, J</creatorcontrib><creatorcontrib>Soudain-Pineau, M</creatorcontrib><creatorcontrib>Medelli, J</creatorcontrib><creatorcontrib>Joly, P</creatorcontrib><title>Cinetique de la consommation d'oxygene chez le cycliste amateur</title><title>Science & sports</title><description>Aims: Study was to analyze the relationship between oxygen uptake and power output in amateur cyclists before and after threshold corresponding to a blood lactate concentration of 4mmol/l. 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Slope's analyse before and after lactate threshold could present complementary criteria for a good discrimination in comparison with classic concepts used during an incremental exhaustive test.</abstract><doi>10.1016/j.scispo.2008.03.001</doi><tpages>7</tpages></addata></record> |
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title | Cinetique de la consommation d'oxygene chez le cycliste amateur |
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