The Effect of Quadriceps Muscle Length on Maximum Neuromuscular Electrical Stimulation Evoked Contraction, Muscle Architecture, and Tendon-Aponeurosis Stiffness.
exercise physiology
moment-angle relationship
muscle architecture
neuromuscular electrical stimulation
tendon-aponeurosis complex
Journal
Frontiers in physiology
ISSN: 1664-042X
Titre abrégé: Front Physiol
Pays: Switzerland
ID NLM: 101549006
Informations de publication
Date de publication:
2021
2021
Historique:
received:
25
11
2020
accepted:
12
02
2021
entrez:
15
4
2021
pubmed:
16
4
2021
medline:
16
4
2021
Statut:
epublish
Résumé
Muscle-tendon unit length plays a crucial role in quadriceps femoris muscle (QF) physiological adaptation, but the influence of hip and knee angles during QF neuromuscular electrical stimulation (NMES) is poorly investigated. We investigated the effect of muscle length on maximum electrically induced contraction (MEIC) and current efficiency. We secondarily assessed the architecture of all QF constituents and their tendon-aponeurosis complex (TAC) displacement to calculate a stiffness index. This study was a randomized, repeated measure, blinded design with a sample of twenty healthy men aged 24.0 ± 4.6. The MEIC was assessed in four different positions: supine with knee flexion of 60° (SUP60); seated with knee flexion of 60° (SIT60); supine with knee flexion of 20° (SUP20), and seated with knee flexion of 20° (SIT20). The current efficiency (MEIC/maximum tolerated current amplitude) was calculated. Ultrasonography of the QF was performed at rest and during NMES to measure pennation angle (θ www.ClinicalTrials.gov, identifier NCT03822221.
Identifiants
pubmed: 33854439
doi: 10.3389/fphys.2021.633589
pmc: PMC8040804
doi:
Banques de données
ClinicalTrials.gov
['NCT03822221']
Types de publication
Journal Article
Langues
eng
Pagination
633589Informations de copyright
Copyright © 2021 Cavalcante, Marqueti, Geremia, Sousa Neto, Baroni, Silbernagel, Bottaro, Babault and Durigan.
Déclaration de conflit d'intérêts
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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