EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/26150 |
Resumo: | This pilot study aimed to explore a method for characterization of the electromyogram frequency spectrum during a sustained exertion task, performed by the upper limb. Methods: Nine participants underwent an isometric localized muscle fatigue protocol on an isokinetic dynamometer until exhaustion, while monitored with surface electromyography (sEMG) of the shoulder’s external rotators. Firstly, three methods of signal energy analysis based on primer frequency contributors were compared to the energy of the entire spectrum. Secondly, the chosen method of analysis was used to characterize the signal energy at beginning (T1), in the middle (T2) and at the end (T3) of the fatigue protocol and compared to the torque output and the shift in the median frequencies during the trial. Results: There were statistically significant differences between T1 and T3 for signal energy (p < 0.007) and for central frequency of the interval (p = 0.003). Moreover, the isometric peak torque was also different between T1 and T3 (p < 0.001). Overall, there were no differences between the signal energy enclosed in the 40 primer frequency contributors and the analysis of the full spectrum energy; consequently, it was the method of choice. The reported fatigue and the decrease in the produced muscle torque was consistent with fatigue-induced alterations in the electromyogram frequency spectrum. In conclusion, the developed protocol has potential to be considered as an easy-to-use method for EMG-based analysis of isometric muscle exertion until fatigue. Thus, the novelty of the proposed method is to explore, in muscle fatigue, the use of only the main contributors in the frequency domain of the EMG spectrum, avoiding surplus information, that may not represent muscle functioning. However, further studies are needed to investigate the stability of the present findings in a more comprehensive sample. |
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EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel methodSurface electromyographysEMGFrequency spectrumFast Fourier transformationFatigueSignal processingIsokinetic dynamometerResearch Subject Categories::INTERDISCIPLINARY RESEARCH AREAS::SportsThis pilot study aimed to explore a method for characterization of the electromyogram frequency spectrum during a sustained exertion task, performed by the upper limb. Methods: Nine participants underwent an isometric localized muscle fatigue protocol on an isokinetic dynamometer until exhaustion, while monitored with surface electromyography (sEMG) of the shoulder’s external rotators. Firstly, three methods of signal energy analysis based on primer frequency contributors were compared to the energy of the entire spectrum. Secondly, the chosen method of analysis was used to characterize the signal energy at beginning (T1), in the middle (T2) and at the end (T3) of the fatigue protocol and compared to the torque output and the shift in the median frequencies during the trial. Results: There were statistically significant differences between T1 and T3 for signal energy (p < 0.007) and for central frequency of the interval (p = 0.003). Moreover, the isometric peak torque was also different between T1 and T3 (p < 0.001). Overall, there were no differences between the signal energy enclosed in the 40 primer frequency contributors and the analysis of the full spectrum energy; consequently, it was the method of choice. The reported fatigue and the decrease in the produced muscle torque was consistent with fatigue-induced alterations in the electromyogram frequency spectrum. In conclusion, the developed protocol has potential to be considered as an easy-to-use method for EMG-based analysis of isometric muscle exertion until fatigue. Thus, the novelty of the proposed method is to explore, in muscle fatigue, the use of only the main contributors in the frequency domain of the EMG spectrum, avoiding surplus information, that may not represent muscle functioning. However, further studies are needed to investigate the stability of the present findings in a more comprehensive sample.The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES (PIDDAC) to CeDRI (UIDB/05757/2020 and UIDP/05757/2020) and SusTEC (LA/P/0007/2021).MDPIBiblioteca Digital do IPBRodrigues, Sandra BeatrizFaria, Luís PalermoMonteiro, A.M.Lima, JoséBarbosa, Tiago M.Duarte, José Alberto2022-12-06T10:27:41Z20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/26150engRodrigues, Sandra B.; Faria, Luís Palermo; Monteiro, A.M.; Lima, José Luís; Barbosa, Tiago M.; Duarte, José Alberto (2022). EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method. International Journal of Environmental Research and Public Health. ISSN 1660-4601. 19:20, p. 1-1110.3390/ijerph1920132701660-4601info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:58:12Zoai:bibliotecadigital.ipb.pt:10198/26150Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:16:35.299149Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
title |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
spellingShingle |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method Rodrigues, Sandra Beatriz Surface electromyography sEMG Frequency spectrum Fast Fourier transformation Fatigue Signal processing Isokinetic dynamometer Research Subject Categories::INTERDISCIPLINARY RESEARCH AREAS::Sports |
title_short |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
title_full |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
title_fullStr |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
title_full_unstemmed |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
title_sort |
EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method |
author |
Rodrigues, Sandra Beatriz |
author_facet |
Rodrigues, Sandra Beatriz Faria, Luís Palermo Monteiro, A.M. Lima, José Barbosa, Tiago M. Duarte, José Alberto |
author_role |
author |
author2 |
Faria, Luís Palermo Monteiro, A.M. Lima, José Barbosa, Tiago M. Duarte, José Alberto |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Rodrigues, Sandra Beatriz Faria, Luís Palermo Monteiro, A.M. Lima, José Barbosa, Tiago M. Duarte, José Alberto |
dc.subject.por.fl_str_mv |
Surface electromyography sEMG Frequency spectrum Fast Fourier transformation Fatigue Signal processing Isokinetic dynamometer Research Subject Categories::INTERDISCIPLINARY RESEARCH AREAS::Sports |
topic |
Surface electromyography sEMG Frequency spectrum Fast Fourier transformation Fatigue Signal processing Isokinetic dynamometer Research Subject Categories::INTERDISCIPLINARY RESEARCH AREAS::Sports |
description |
This pilot study aimed to explore a method for characterization of the electromyogram frequency spectrum during a sustained exertion task, performed by the upper limb. Methods: Nine participants underwent an isometric localized muscle fatigue protocol on an isokinetic dynamometer until exhaustion, while monitored with surface electromyography (sEMG) of the shoulder’s external rotators. Firstly, three methods of signal energy analysis based on primer frequency contributors were compared to the energy of the entire spectrum. Secondly, the chosen method of analysis was used to characterize the signal energy at beginning (T1), in the middle (T2) and at the end (T3) of the fatigue protocol and compared to the torque output and the shift in the median frequencies during the trial. Results: There were statistically significant differences between T1 and T3 for signal energy (p < 0.007) and for central frequency of the interval (p = 0.003). Moreover, the isometric peak torque was also different between T1 and T3 (p < 0.001). Overall, there were no differences between the signal energy enclosed in the 40 primer frequency contributors and the analysis of the full spectrum energy; consequently, it was the method of choice. The reported fatigue and the decrease in the produced muscle torque was consistent with fatigue-induced alterations in the electromyogram frequency spectrum. In conclusion, the developed protocol has potential to be considered as an easy-to-use method for EMG-based analysis of isometric muscle exertion until fatigue. Thus, the novelty of the proposed method is to explore, in muscle fatigue, the use of only the main contributors in the frequency domain of the EMG spectrum, avoiding surplus information, that may not represent muscle functioning. However, further studies are needed to investigate the stability of the present findings in a more comprehensive sample. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-06T10:27:41Z 2022 2022-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/26150 |
url |
http://hdl.handle.net/10198/26150 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Rodrigues, Sandra B.; Faria, Luís Palermo; Monteiro, A.M.; Lima, José Luís; Barbosa, Tiago M.; Duarte, José Alberto (2022). EMG signal processing for the study of localized muscle fatigue—pilot study to explore the applicability of a novel method. International Journal of Environmental Research and Public Health. ISSN 1660-4601. 19:20, p. 1-11 10.3390/ijerph192013270 1660-4601 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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