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Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training
CHRU of Strasbourg, Physiology and Functional Explorations Department, Civil Hospital, BP 426, Strasbourg, France; Faculty of Medicine, Physiology Department, University Louis Pasteur, Strasbourg, France .
CHRU of Strasbourg, Physiology and Functional Explorations Department, Civil Hospital, BP 426, Strasbourg, France; Faculty of Medicine, Physiology Department, University Louis Pasteur, Strasbourg, France.ORCID iD: 0000-0002-8071-4745
CHRU of Strasbourg, Physiology and Functional Explorations Department, Civil Hospital, BP 426, Strasbourg, France; Faculty of Medicine, Physiology Department, University Louis Pasteur, Strasbourg, France.
CHRU of Strasbourg, Physiology and Functional Explorations Department, Civil Hospital, BP 426, Strasbourg, France; Faculty of Medicine, Physiology Department, University Louis Pasteur, Strasbourg, France.
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2007 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 101, no 3, 377-83 p.Article in journal (Refereed) Published
Abstract [en]

Improvement of exercise capacity by continuous (CT) versus interval training (IT) remains debated. We tested the hypothesis that CT and IT might improve peripheral and/or central adaptations, respectively, by randomly assigning 10 healthy subjects to two periods of 24 trainings sessions over 8 weeks in a cross-over design, separated by 12 weeks of detraining. Maximal oxygen uptake (VO2max), cardiac output (Qmax) and maximal arteriovenous oxygen difference (Da-vO2max) were obtained during an exhaustive incremental test before and after each training period. VO2max and Qmax increased only after IT (from 26.3 +/- 1.6 to 35.2 +/- 3.8 ml min(-1) kg(-1) and from 17.5 +/- 1.3 to 19.5 +/- 1.8 l min(-1), respectively; P < 0.01). Da-vO2max increased after both protocols (from 11.0 +/- 0.8 to 12.7 +/- 1.0; P < 0.01 and from 11.0 +/- 0.8 to 12.1 +/- 1.0 ml 100 ml(-1), P < 0.05 in CT and IT, respectively). At submaximal intensity a significant rightward shift of the Q/Da-vO2 relationship appeared only after CT. These results suggest that in isoenergetic training, central and peripheral adaptations in oxygen transport and utilization are training-modality dependant. IT improves both central and peripheral components of Da-vO2max whereas CT is mainly associated with greater oxygen extraction.

Place, publisher, year, edition, pages
New York, USA: Springer, 2007. Vol. 101, no 3, 377-83 p.
Keyword [en]
Training modality, cardiac output, arteriovenous difference, maximal oxygen consumption, sedentary subjects
National Category
Medical and Health Sciences Sport and Fitness Sciences
Research subject
Sports Science
Identifiers
URN: urn:nbn:se:oru:diva-43573DOI: 10.1007/s00421-007-0499-3ISI: 000249301100013PubMedID: 17661072Scopus ID: 2-s2.0-34548501981OAI: oai:DiVA.org:oru-43573DiVA: diva2:794986
Available from: 2015-03-13 Created: 2015-03-13 Last updated: 2015-04-02Bibliographically approved

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