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Muscle-fiber conduction velocity estimated from surface EMG signals during explosive dynamic contractions

POZZO M
•
MERLO E
•
FARINA D
altro
DI PRAMPERO PE
2004
  • journal article

Periodico
MUSCLE & NERVE
Abstract
Muscle-fiber conduction velocity (CV) was estimated from surface electromyographic (EMG) signals during isometric contractions and during short (150-200 ms), explosive, dynamic exercises. Surface EMG signals were recorded with four linear adhesive arrays from the vastus lateralis and medialis muscles of 12 healthy subjects. Isometric contractions were at linearly increasing force from 0% to 100% of the maximum. The dynamic contractions consisted of explosive efforts of the lower limb on a sledge ergometer. For the explosive contractions, muscle-fiber CV was estimated in seven time-windows located along the ascending time interval of the force. There was a significant correlation between CV values during the isometric ramp and explosive contractions (R = 0.75). Moreover, CV estimates increased significantly from (mean ± SD) 4.32 ± 0.46 m/s to 4.97 ± 0.45 m/s during the increasing-force explosive task. It was concluded that CV can be estimated reliably during dynamic tasks involving fast limb movements and that, in these contractions, it may provide important information on motor-unit control properties.
WOS
WOS:000221831600009
Archivio
http://hdl.handle.net/11390/855363
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-2642540975
Diritti
metadata only access
Visualizzazioni
3
Data di acquisizione
Apr 19, 2024
Vedi dettagli
google-scholar
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