Conduction Velocity of Muscle Action Potential of Knee Extensor Muscle During Evoked and Voluntary Contractions After Exhaustive Leg Pedaling Exercise.
cycling
multi-channel surface electromyography
neuromuscular fatigue
quadriceps
vastus lateralis
Journal
Frontiers in physiology
ISSN: 1664-042X
Titre abrégé: Front Physiol
Pays: Switzerland
ID NLM: 101549006
Informations de publication
Date de publication:
2020
2020
Historique:
received:
12
11
2019
accepted:
30
04
2020
entrez:
16
6
2020
pubmed:
17
6
2020
medline:
17
6
2020
Statut:
epublish
Résumé
Muscle fiber conduction velocity (CV) has been developed to estimate neuromuscular fatigue and measured during voluntary (VC) and electrically evoked (EC) contractions. Since CV during VC and EC reflect different physiological phenomena, the two parameters would show inconsistent changes under the conditions of neuromuscular fatigue. We investigated the time-course changes of CV during EC and VC after fatiguing exercise. In 14 young males, maximal voluntary contraction (MVC) of knee extensor muscles, CV during electrical stimulation (CV-EC) and MVC (CV-VC) were measured before and immediately, 30 min, 60 min, 120 min, and 24 h after exhaustive leg pedaling exercise. CV-EC significantly increased immediately after the fatiguing exercise ( These results suggest that CV during EC and VC exhibits different time-course changes, and that CV during EC may be appropriate to estimate the degree of neuromuscular fatigue after fatiguing pedaling exercise.
Identifiants
pubmed: 32536878
doi: 10.3389/fphys.2020.00546
pmc: PMC7267216
doi:
Types de publication
Journal Article
Langues
eng
Pagination
546Informations de copyright
Copyright © 2020 Watanabe, Sakai, Kato, Hashizume, Horii, Yoshikawa, Hasegawa, Iemitsu, Tsuji, Uchida, Kanamori and Iemitsu.
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