| Full text | |
| Author(s): |
Cristiano Rocha da Silva
[1]
;
Beatriz Sanches Geres
[2]
;
Heloyse Uliam Kuriki
;
Rúben de Faria Negrão Filho
[4]
;
Neri Alves
;
Fábio Mícolis de Azevedo
[6]
Total Authors: 6
|
| Affiliation: | [1] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Laboratório de Biomecânica e Controle Motor - Brasil
[2] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Laboratório de Biomecânica e Controle Motor - Brasil
[4] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Laboratório de Biomecânica e Controle Motor - Brasil
[6] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Laboratório de Biomecânica e Controle Motor - Brasil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Motriz: rev. educ. fis.; v. 18, n. 3, p. 456-464, 2012-09-00. |
| Abstract | |
The aim of this study was to analyze the reproducibility of the electromyography signal's parameters (EMG) in the frequency domain used in the characterization of localized muscle fatigue. Fifteen male subjects underwent a fatigue test based on isometric knee extension, being held at three different times at intervals of seven days. To assess the reproducibility of data between the tests we calculated the correlation coefficient (ICC) for the median frequency (MF) in total exercise time (MF T), MF obtained for every 10% of exercise time (MF10%) and the powers of the frequency bands obtained by dividing the power spectrum at windows of 20 Hz. The results showed: (1) excellent reproducibility for MF T, (2) good reproducibility for MF10%, and (3) greater variation in the signal EMG bands from 20 to 120 Hz, especially at the bands of 20-40 Hz and 40-60 Hz, which showed greater sensitivity to the process of muscle fatigue. We conclude that the MF is a variable that shows good reproducibility and that the fragmented analysis of the power spectrum, by means of frequency bands, showed that significant variations occur in the EMG signal during the installation of the fatigue process, having potential to become a new method for the characterization of localized muscle fatigue. (AU) | |
| FAPESP's process: | 08/11639-4 - Reliability analysis of frequency domain parameter in EMG signal used to determination of electromyographic fatigue threshold. |
| Grantee: | Beatriz Sanches Geres |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |