(.)VO(2) and EMG activity kinetics during moderate and severe constant work rate exercise in trained cyclists.

Détails

ID Serval
serval:BIB_37622
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
(.)VO(2) and EMG activity kinetics during moderate and severe constant work rate exercise in trained cyclists.
Périodique
Canadian Journal of Applied Physiology
Auteur(s)
Cleuziou C., Perrey S., Borrani F., Lecoq A.M., Courteix D., Germain P., Obert P.
ISSN
1066-7814 (Print)
ISSN-L
1066-7814
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
29
Numéro
6
Pages
758-772
Langue
anglais
Résumé
The purpose of this study was to compare O(2) uptake ((.)VO(2)) and muscle electromyography activity kinetics during moderate and severe exercise to test the hypothesis of progressive recruitment of fast-twitch fibers in the explanation of the VO(2) slow component. After an incremental test to exhaustion, 7 trained cyclists (mean +/- SD, 61.4 +/- 4.2 ml x min(-1) x kg(- 1)) performed several square-wave transitions for 6 min at moderate and severe intensities on a bicycle ergometer. The (.)VO(2) response and the electrical activity (i.e., median power frequency, MDF) of the quadriceps vastus lateralis and vastus medialis of both lower limbs were measured continuously during exercise. After 2 to 3 min of exercise onset, MDF values increased similarly during moderate and severe exercise for almost all muscles whereas a (.)VO(2) slow component occurred during severe exercise. There was no relationship between the increase of MDF values and the magnitude of the (.)VO(2) slow component during the severe exercise. These results suggest that the origin of the slow component may not be due to the progressive recruitment of fast-twitch fibers.
Mots-clé
Adolescent, Adult, Bicycling/physiology, Electromyography, Humans, Male, Muscle Fibers, Fast-Twitch/physiology, Muscle, Skeletal/physiology, Oxygen Consumption/physiology, Physical Endurance/physiology, Physical Exertion/physiology, Quadriceps Muscle/physiology, Task Performance and Analysis, Time Factors
Pubmed
Web of science
Création de la notice
19/11/2007 11:12
Dernière modification de la notice
03/03/2018 16:05
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