Aerobic fitness influences cerebral ...
Type de document :
Article dans une revue scientifique
PMID :
URL permanente :
Titre :
Aerobic fitness influences cerebral oxygenation response to maximal exercise in healthy subjects
Auteur(s) :
Oussaidene, Kahina [Auteur]
Prieur, Fabrice [Auteur]
Tagougui, Semah [Auteur]
Abaïdia, Abd-Elbasset [Auteur]
Matran, Regis [Auteur]
Impact de l'environnement chimique sur la santé humaine - ULR 4483 [IMPECS]
Mucci, Patrick [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Prieur, Fabrice [Auteur]
Tagougui, Semah [Auteur]
Abaïdia, Abd-Elbasset [Auteur]
Matran, Regis [Auteur]
Impact de l'environnement chimique sur la santé humaine - ULR 4483 [IMPECS]
Mucci, Patrick [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Titre de la revue :
Respiratory physiology & neurobiology
Nom court de la revue :
Respir. Physiol. Neuro.
Numéro :
205
Pagination :
53-60
Date de publication :
2015-01-01
ISSN :
1569-9048
Mot(s)-clé(s) en anglais :
Ventilatory threshold
Near-infrared spectroscopy (NIRS)
Endurance training
Cerebral deoxygenation
Exhaustive cycle exercise
Near-infrared spectroscopy (NIRS)
Endurance training
Cerebral deoxygenation
Exhaustive cycle exercise
Discipline(s) HAL :
Sciences du Vivant [q-bio]
Résumé en anglais : [en]
The study examined whether the aerobic fitness level modifies the cerebral oxygenation response to incremental ramp exercise, and more specifically the decline in cerebral oxygenation from heavy exercise up to maximal ...
Lire la suite >The study examined whether the aerobic fitness level modifies the cerebral oxygenation response to incremental ramp exercise, and more specifically the decline in cerebral oxygenation from heavy exercise up to maximal intensities. 11 untrained (VO2max 47.3±4.0 mL min(-1) kg(-1)) and 13 endurance-trained (VO2max 61.2±8.0 mL min(-1) kg(-1)) healthy men performed a maximal ramp cycle exercise. Left prefrontal cortex oxygenation (ΔHbO2) was monitored by near-infrared spectroscopy. A cerebral oxygenation threshold decline (ThCOx) during exercise was determined. ThCox occurred in all subjects but for higher VO2 (mL min(-1) kg(-1)) in endurance-trained than in untrained subjects (P<0.01). At submaximal exercise intensity corresponding to ThCOx, ΔHbO2 was higher in endurance-trained than in untrained subjects (P<0.05). VO2 at ThCox was related to VO2 at respiratory compensation point (n=24, r=0.93, P<0.001) and to VO2max (n=24, r=0.92, P<0.001). These findings indicate that above the respiratory compensation point the prefrontal O2 demand exceeds the supply in untrained and in endurance-trained subjects. In addition, the occurrence of ThCOx was delayed to higher absolute exercise intensities in endurance-trained in relation with their higher VO2max than untrained men. These results demonstrated that aerobic fitness influences cerebral oxygenation during exercise.Lire moins >
Lire la suite >The study examined whether the aerobic fitness level modifies the cerebral oxygenation response to incremental ramp exercise, and more specifically the decline in cerebral oxygenation from heavy exercise up to maximal intensities. 11 untrained (VO2max 47.3±4.0 mL min(-1) kg(-1)) and 13 endurance-trained (VO2max 61.2±8.0 mL min(-1) kg(-1)) healthy men performed a maximal ramp cycle exercise. Left prefrontal cortex oxygenation (ΔHbO2) was monitored by near-infrared spectroscopy. A cerebral oxygenation threshold decline (ThCOx) during exercise was determined. ThCox occurred in all subjects but for higher VO2 (mL min(-1) kg(-1)) in endurance-trained than in untrained subjects (P<0.01). At submaximal exercise intensity corresponding to ThCOx, ΔHbO2 was higher in endurance-trained than in untrained subjects (P<0.05). VO2 at ThCox was related to VO2 at respiratory compensation point (n=24, r=0.93, P<0.001) and to VO2max (n=24, r=0.92, P<0.001). These findings indicate that above the respiratory compensation point the prefrontal O2 demand exceeds the supply in untrained and in endurance-trained subjects. In addition, the occurrence of ThCOx was delayed to higher absolute exercise intensities in endurance-trained in relation with their higher VO2max than untrained men. These results demonstrated that aerobic fitness influences cerebral oxygenation during exercise.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
CHU Lille
Univ. Littoral Côte d’Opale
Univ. Artois
Université de Lille
Institut Pasteur de Lille
Univ. Littoral Côte d’Opale
Univ. Artois
Université de Lille
Institut Pasteur de Lille
Collections :
Équipe(s) de recherche :
Activité Physique, Muscle, Santé (APMS)
Date de dépôt :
2019-09-24T07:28:50Z