Titre :

Effect of pedaling cadence on muscle oxygenation during high-intensity cycling until exhaustion: a comparison between untrained subjects and triathletes

Auteur(s) :

Zorgati, Houssem [Auteur]
Collomp, Katia [Auteur]
Boone, Jan [Auteur]
Guimard, Alexandre [Auteur]
Buttelli, Olivier [Auteur]
Mucci, Patrick [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369
Amiot, Virgile [Auteur]
Prieur, Fabrice [Auteur]

Titre de la revue :

European journal of applied physiology

Nom court de la revue :

Eur. J. Appl. Physiol.

Numéro :

115

Pagination :

2681-2689

Date de publication :

2015-12-01

ISSN :

1439-6319

Mot(s)-clé(s) en anglais :

Performance
Near-infrared spectroscopy
Pedal rate
Pedal frequency
Muscle oxygenation
Aerobic fitness

Discipline(s) HAL :

Sciences du Vivant [q-bio]

Résumé en anglais : [en]

OBJECTIVE: The aim of this study was to compare the muscle oxygenation between trained and untrained subjects during heavy exercise until exhaustion at two extreme pedaling cadences using a NIRS system. METHODS: Nine ...
Lire la suite >OBJECTIVE: The aim of this study was to compare the muscle oxygenation between trained and untrained subjects during heavy exercise until exhaustion at two extreme pedaling cadences using a NIRS system. METHODS: Nine untrained male subjects and nine male competitive triathletes cycled until exhaustion at an intensity corresponding to 90 % of the power output achieved at peak oxygen uptake at 40 and 100 rpm. Gas exchanges were measured breath-by-breath during each exercise. Muscle (de)oxygenation was monitored continuously by near-infrared spectroscopy on the Vastus Lateralis. RESULTS: Muscle deoxygenation (∆deoxy[Hb + Mb], i.e., O2 extraction) and ∆total[Hb + Mb] were significantly higher at 40 rpm compared to 100 rpm during the exercise in untrained subjects but not in triathletes (p < 0.05). The time performed until exhaustion was significantly higher at 40 than at 100 rpm in untrained subjects (373 ± 55 vs. 234 ± 37 s, respectively) but not in triathletes (339 ± 69 vs. 325 ± 66 s). CONCLUSIONS: These results indicate that high aerobic fitness (1) allows for better regulation between [Formula: see text]O2M and VO2M following the change in pedaling cadence, and (2) is the most important factor in the relationship between pedaling cadence and performance.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Univ. Littoral Côte d’Opale
Univ. Artois
Université de Lille

Collections :

• Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369

Équipe(s) de recherche :

Activité Physique, Muscle, Santé (APMS)

Date de dépôt :

2019-09-24T10:01:14Z