Alterations to neuromuscular properties of skeletal muscle are temporally dissociated from the oxygen uptake slow component.

Details

Serval ID
serval:BIB_ACB2F70D6C11
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Alterations to neuromuscular properties of skeletal muscle are temporally dissociated from the oxygen uptake slow component.
Journal
Scientific reports
Author(s)
Gajanand T., Conde Alonso S., Ramos J.S., Antonietti J.P., Borrani F.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
07/05/2020
Peer-reviewed
Oui
Volume
10
Number
1
Pages
7728
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
To assess if the alteration of neuromuscular properties of knee extensors muscles during heavy exercise co-vary with the SCV ([Formula: see text] slow component), eleven healthy male participants completed an incremental ramp test to exhaustion and five constant heavy intensity cycling bouts of 2, 6, 10, 20 and 30 minutes. Neuromuscular testing of the knee extensor muscles were completed before and after exercise. Results showed a significant decline in maximal voluntary contraction (MVC) torque only after 30 minutes of exercise (-17.01% ± 13.09%; p < 0.05) while single twitch (PT), 10 Hz (P10), and 100 Hz (P100) doublet peak torque amplitudes were reduced after 20 and 30 minutes (p < 0.05). Voluntary activation (VA) and M-wave were not affected by exercise, but significant correlation was found between the SCV and PT, MVC, VA, P10, P100, and P10/P100 ratio, respectively (p < 0.015). Therefore, because the development of the SCV occurred mainly between 2-10 minutes, during which neuromuscular properties were relatively stable, and because PT, P10 and P100 were significantly reduced only after 20-30 minutes of exercise while SCV is stable, a temporal relationship between them does not appear to exist. These results suggest that the development of fatigue due to alterations of neuromuscular properties is not an essential requirement to elicit the SCV.
Keywords
Multidisciplinary
Pubmed
Web of science
Open Access
Yes
Create date
10/05/2020 15:31
Last modification date
11/07/2020 6:18
Usage data