Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004 |
Resumo: | The objective of this paper was to verify the reliability of the amplitude of the EMG signal of the vastus lateralis muscle (VL) in the right thigh, in different occasions, during maximum and submaximum knee extensors isometric actions. Three people performed the following protocol: execution of 3 maximum voluntary isometric contractions (MVCs) during 3 s each, with later execution of submaximum actions (20, 40, 60 and 80% of the MVC), calculated considering the MVC of the highest torque peak. Each submaximum contraction (SC) lasted 4 s and was kept through a visual feedback (oscilloscope). Between each MVC and among the SC a 2 min gap was given.Parallel to the actions, EMG signal of the VL muscle was obtained through the surface electrodes put on the muscle venter longitudinally to the direction of the fibers. A reference electrode was positioned in the tuberosity of the tibia. To attest the same position among the sampling the site of the electrodes was marked with a pen for retroprojector. The same protocol was performed after 48hs for reliability analysis. Such analysis was made through Pearson correlation, with significance p<0.05. After signal processing and comparison of root mean square values, obtained in the test and re-test, it was found a high correlation among these values (r=0.972, p<0.01). These results suggest the reliability of the EMG signal, which would make its usage available for investigations that aim at comparing its amplitude in acquisitions performed in different occasions. |
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Electromiographic signal reliability analysis during maximum and submaximum knee isometric actionselectromiographyreliabilityisometric actionsThe objective of this paper was to verify the reliability of the amplitude of the EMG signal of the vastus lateralis muscle (VL) in the right thigh, in different occasions, during maximum and submaximum knee extensors isometric actions. Three people performed the following protocol: execution of 3 maximum voluntary isometric contractions (MVCs) during 3 s each, with later execution of submaximum actions (20, 40, 60 and 80% of the MVC), calculated considering the MVC of the highest torque peak. Each submaximum contraction (SC) lasted 4 s and was kept through a visual feedback (oscilloscope). Between each MVC and among the SC a 2 min gap was given.Parallel to the actions, EMG signal of the VL muscle was obtained through the surface electrodes put on the muscle venter longitudinally to the direction of the fibers. A reference electrode was positioned in the tuberosity of the tibia. To attest the same position among the sampling the site of the electrodes was marked with a pen for retroprojector. The same protocol was performed after 48hs for reliability analysis. Such analysis was made through Pearson correlation, with significance p<0.05. After signal processing and comparison of root mean square values, obtained in the test and re-test, it was found a high correlation among these values (r=0.972, p<0.01). These results suggest the reliability of the EMG signal, which would make its usage available for investigations that aim at comparing its amplitude in acquisitions performed in different occasions.Faculdade de Desporto da Universidade do Porto2007-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004Revista Portuguesa de Ciências do Desporto v.7 n.3 2007reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004Brentano,Michel ASilva,Eduardo MCadore,Eduardo LKruel,Luiz FMinfo:eu-repo/semantics/openAccess2024-02-06T17:16:41Zoai:scielo:S1645-05232007000300004Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:25:34.807937Repositório 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 |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
title |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
spellingShingle |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions Brentano,Michel A electromiography reliability isometric actions |
title_short |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
title_full |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
title_fullStr |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
title_full_unstemmed |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
title_sort |
Electromiographic signal reliability analysis during maximum and submaximum knee isometric actions |
author |
Brentano,Michel A |
author_facet |
Brentano,Michel A Silva,Eduardo M Cadore,Eduardo L Kruel,Luiz FM |
author_role |
author |
author2 |
Silva,Eduardo M Cadore,Eduardo L Kruel,Luiz FM |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Brentano,Michel A Silva,Eduardo M Cadore,Eduardo L Kruel,Luiz FM |
dc.subject.por.fl_str_mv |
electromiography reliability isometric actions |
topic |
electromiography reliability isometric actions |
description |
The objective of this paper was to verify the reliability of the amplitude of the EMG signal of the vastus lateralis muscle (VL) in the right thigh, in different occasions, during maximum and submaximum knee extensors isometric actions. Three people performed the following protocol: execution of 3 maximum voluntary isometric contractions (MVCs) during 3 s each, with later execution of submaximum actions (20, 40, 60 and 80% of the MVC), calculated considering the MVC of the highest torque peak. Each submaximum contraction (SC) lasted 4 s and was kept through a visual feedback (oscilloscope). Between each MVC and among the SC a 2 min gap was given.Parallel to the actions, EMG signal of the VL muscle was obtained through the surface electrodes put on the muscle venter longitudinally to the direction of the fibers. A reference electrode was positioned in the tuberosity of the tibia. To attest the same position among the sampling the site of the electrodes was marked with a pen for retroprojector. The same protocol was performed after 48hs for reliability analysis. Such analysis was made through Pearson correlation, with significance p<0.05. After signal processing and comparison of root mean square values, obtained in the test and re-test, it was found a high correlation among these values (r=0.972, p<0.01). These results suggest the reliability of the EMG signal, which would make its usage available for investigations that aim at comparing its amplitude in acquisitions performed in different occasions. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12-01 |
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://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S1645-05232007000300004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Faculdade de Desporto da Universidade do Porto |
publisher.none.fl_str_mv |
Faculdade de Desporto da Universidade do Porto |
dc.source.none.fl_str_mv |
Revista Portuguesa de Ciências do Desporto v.7 n.3 2007 reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
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 |
repository.mail.fl_str_mv |
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1799137331077185536 |