Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training.

Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training. Research Abstract Details 

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Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training. Abstract Text:

Daussin,Elodie Ponsot, Dufour,Evelyne Lonsdorfer-Wolf, Doutreleau,Bernard Geny, Piquard,Ruddy Richard, Daussin,Elodie Ponsot, Dufour,Evelyne Lonsdorfer-Wolf, Doutreleau,Bernard Geny, Piquard,Ruddy Richard,

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.

Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training. Publishing Authors By Initials

FN Daussin,E Ponsot,SP Dufour,E Lonsdorfer-Wolf,S Doutreleau,B Geny,F Piquard,R Richard,FN Daussin,E Ponsot,SP Dufour,E Lonsdorfer-Wolf,S Doutreleau,B Geny,F Piquard,R Richard,

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Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: European journal of applied physiology

VOLUME: 101

Page Numbers: 377-83

Journal Abbreviation: Eur. J. Appl. Physiol.

ISSN: 1439-6319

DAY: 28

MONTH: 07

YEAR: 2007

Improvement of VO2max by cardiac output and oxygen extraction adaptation during intermittent versus continuous endurance training. Information

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LANGUAGE: eng

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AFFILIATION: CHRU of Strasbourg, Physiology and Functional Explorations Department, Civil Hospital, BP 426, 67091, Strasbourg, France. fredericdaussin@wanadoo.fr

Country: Germany

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MEDLINETA: Eur J Appl Physiol

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