Faster pulmonary oxygen uptake kinetics ...
Type de document :
Article dans une revue scientifique: Article original
PMID :
URL permanente :
Titre :
Faster pulmonary oxygen uptake kinetics in children vs adults due to enhancements in oxygen delivery and extraction.
Auteur(s) :
Leclair, E [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Berthoin, S [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Borel, B [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Thevenet, D [Auteur]
Carter, H [Auteur]
Baquet, G [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Mucci, P [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Berthoin, S [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Borel, B [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Thevenet, D [Auteur]
Carter, H [Auteur]
Baquet, G [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Mucci, P [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Titre de la revue :
Scandinavian Journal of Medicine & Science in Sports
Nom court de la revue :
Scand J Med Sci Sports
Numéro :
23
Pagination :
705-12
Date de publication :
2013-12-01
ISSN :
1600-0838
Mot(s)-clé(s) en anglais :
Capillaries
Child
Child Development
Exercise
Exercise Test
Hemoglobins
Humans
Kinetics
Lung
Male
Muscle, Skeletal
Oxygen
Oxygen Consumption
Pulmonary Gas Exchange
Regional Blood Flow
Spectroscopy, Near-Infrared
Young Adult
exercise
growth
muscle O2 utilization
near-infrared spectroscopy
Child
Child Development
Exercise
Exercise Test
Hemoglobins
Humans
Kinetics
Lung
Male
Muscle, Skeletal
Oxygen
Oxygen Consumption
Pulmonary Gas Exchange
Regional Blood Flow
Spectroscopy, Near-Infrared
Young Adult
exercise
growth
muscle O2 utilization
near-infrared spectroscopy
Résumé en anglais : [en]
This study aimed to examine if the faster pulmonary oxygen uptake (VO2p) phase 2 in children could be explained by increased O2 availability or extraction at the muscle level. For that purpose, O2 availability and extraction ...
Lire la suite >This study aimed to examine if the faster pulmonary oxygen uptake (VO2p) phase 2 in children could be explained by increased O2 availability or extraction at the muscle level. For that purpose, O2 availability and extraction were assessed using deoxyhemoglobin (HHb) estimated by near-infrared spectroscopy during moderate-intensity constant load cycling exercise in children and young adults. Eleven prepubertal boys and 12 men volunteered to participate in the study. They performed one maximal graded exercise to determine the power associated with the gas exchange threshold (GET) and four constant load exercises at 90% of GET. VO2p and HHb were continuously monitored. VO2p , HHb, and estimated capillary blood flow (Qcap) kinetics were modelled after a time delay and characterized by the time to achieve 63% of the amplitude (τ) and by mean response time (MRT: time delay + τ), respectively. Mean values of τ for VO2p (P < 0.001), of MRT for HHb (P < 0.01) and of MRT for Qcap (P < 0.001) were significantly shorter in children. Faster VO2p kinetics have been shown in children; these appear due to both faster O2 extraction and delivery kinetics as indicated by faster HHb and Qcap kinetics, respectively.Lire moins >
Lire la suite >This study aimed to examine if the faster pulmonary oxygen uptake (VO2p) phase 2 in children could be explained by increased O2 availability or extraction at the muscle level. For that purpose, O2 availability and extraction were assessed using deoxyhemoglobin (HHb) estimated by near-infrared spectroscopy during moderate-intensity constant load cycling exercise in children and young adults. Eleven prepubertal boys and 12 men volunteered to participate in the study. They performed one maximal graded exercise to determine the power associated with the gas exchange threshold (GET) and four constant load exercises at 90% of GET. VO2p and HHb were continuously monitored. VO2p , HHb, and estimated capillary blood flow (Qcap) kinetics were modelled after a time delay and characterized by the time to achieve 63% of the amplitude (τ) and by mean response time (MRT: time delay + τ), respectively. Mean values of τ for VO2p (P < 0.001), of MRT for HHb (P < 0.01) and of MRT for Qcap (P < 0.001) were significantly shorter in children. Faster VO2p kinetics have been shown in children; these appear due to both faster O2 extraction and delivery kinetics as indicated by faster HHb and Qcap kinetics, respectively.Lire moins >
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
Univ. Artois
Univ. Littoral Côte d’Opale
Univ. Artois
Univ. Littoral Côte d’Opale
Équipe(s) de recherche :
Activité Physique, Muscle, Santé (APMS)
Date de dépôt :
2021-11-14T10:44:55Z
Fichiers
- 2013_Leclair_SJMSS.pdf
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