Spinal modulations accompany peripheral fatigue during prolonged tennis playing.

Détails

ID Serval
serval:BIB_317ED6A689EF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Spinal modulations accompany peripheral fatigue during prolonged tennis playing.
Périodique
Scandinavian Journal of Medicine and Science in Sports
Auteur(s)
Girard O., Racinais S., Micallef J.-P., Millet G. P.
ISSN
1600-0838 (Electronic)
ISSN-L
0905-7188
Statut éditorial
Publié
Date de publication
12/2011
Peer-reviewed
Oui
Volume
21
Numéro
3
Pages
455-464
Langue
anglais
Résumé
To examine the time course of alteration in neural process (spinal loop properties) during prolonged tennis playing, 12 competitive players performed a series of neuromuscular tests every 30 min during a 3-h match protocol. Muscle activation (twitch interpolation) and normalized EMG activity were assessed during maximal voluntary contraction (MVC) of plantar flexors. Spinal reflexes and M-waves were evoked at rest (i.e., H(max) and M(max) , respectively) and during MVC (i.e., H(sup) , V-wave, M(sup) , respectively). MVC torque declined significantly (P<0.001) across the match protocol, due to decrease (P<0.001) in muscle activation and in normalized EMG activity. The impairment in MVC was significantly correlated (r=0.77; P<0.05) with the decline in muscle activation. H(max) /M(max) (P<0.001), H(sup) /M(sup) (P<0.01) and V/M(sup) (P<0.05) ratios were depressed with fatigue and decreased by ∼80%, 46% and 61% at the end of exercise, respectively. Simultaneously, peak twitch torque and M-wave amplitude were significantly (P<0.01) altered with exercise, suggesting peripheral alterations. During prolonged tennis playing, the compromised voluntary strength capacity is linked to a reduced neural input to the working muscles. This central activation deficit partly results from a modulation in spinal loop properties.
Pubmed
Web of science
Création de la notice
26/12/2009 9:54
Dernière modification de la notice
20/08/2019 14:16
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