Postactivation Potentiation Biases Maximal Isometric Strength Assessment
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1155/2014/126961 http://hdl.handle.net/11449/117225 |
Resumo: | Postactivation potentiation (PAP) is known to enhance force production. Maximal isometric strength assessment protocols usually consist of two or more maximal voluntary isometric contractions (MVCs). The objective of this study was to determine if PAP would influence isometric strength assessment. Healthy male volunteers (n = 23) performed two five-second MVCs separated by a 180-seconds interval. Changes in isometric peak torque (IPT), time to achieve it (tPTI), contractile impulse (CI), root mean square of the electromyographic signal during PTI (RMS), and rate of torque development (RTD), in different intervals, were measured. Significant increases in IPT (240.6 +/- 55.7 N.m versus 248.9 +/- 55.1 N.m), RTD (746 +/- 152 N.m.s(-1) versus 727 +/- 158 N.m.s(-1)), and RMS (59.1 +/- 12.2% RMSMAX versus 54.8 +/- 9.4% RMSMAX) were found on the second MVC. tPTI decreased significantly on the second MVC (2373 +/- 1200 ms versus 2784 +/- 1226 ms). We conclude that a first MVC leads to PAP that elicits significant enhancements in strength-related variables of a second MVC performed 180 seconds later. If disconsidered, this phenomenon might bias maximal isometric strength assessment, overestimating some of these variables. |
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Repositório Institucional da UNESP |
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Postactivation Potentiation Biases Maximal Isometric Strength AssessmentPostactivation potentiation (PAP) is known to enhance force production. Maximal isometric strength assessment protocols usually consist of two or more maximal voluntary isometric contractions (MVCs). The objective of this study was to determine if PAP would influence isometric strength assessment. Healthy male volunteers (n = 23) performed two five-second MVCs separated by a 180-seconds interval. Changes in isometric peak torque (IPT), time to achieve it (tPTI), contractile impulse (CI), root mean square of the electromyographic signal during PTI (RMS), and rate of torque development (RTD), in different intervals, were measured. Significant increases in IPT (240.6 +/- 55.7 N.m versus 248.9 +/- 55.1 N.m), RTD (746 +/- 152 N.m.s(-1) versus 727 +/- 158 N.m.s(-1)), and RMS (59.1 +/- 12.2% RMSMAX versus 54.8 +/- 9.4% RMSMAX) were found on the second MVC. tPTI decreased significantly on the second MVC (2373 +/- 1200 ms versus 2784 +/- 1226 ms). We conclude that a first MVC leads to PAP that elicits significant enhancements in strength-related variables of a second MVC performed 180 seconds later. If disconsidered, this phenomenon might bias maximal isometric strength assessment, overestimating some of these variables.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Sao Paulo State Univ, Dept Phys Educ, Human Performance Lab, Rio Claro, SP, BrazilSao Paulo State Univ, Dept Phys Educ, Biomech Lab, Rio Claro, SP, BrazilSao Paulo State Univ, Dept Phys Educ, Human Performance Lab, Rio Claro, SP, BrazilSao Paulo State Univ, Dept Phys Educ, Biomech Lab, Rio Claro, SP, BrazilHindawi Publishing CorporationUniversidade Estadual Paulista (Unesp)Rabello Lima, Leonardo Coelho [UNESP]Dias Oliveira, Felipe Bruno [UNESP]Oliveira, Thiago Pires [UNESP]Assumpcao, Claudio de Oliveira [UNESP]Greco, Camila Coelho [UNESP]Cardozo, Adalgiso Croscato [UNESP]Denadai, Benedito Sergio [UNESP]2015-03-18T15:55:34Z2015-03-18T15:55:34Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7application/epub+zipapplication/pdfhttp://dx.doi.org/10.1155/2014/126961Biomed Research International. New York: Hindawi Publishing Corporation, 7 p., 2014.2314-6133http://hdl.handle.net/11449/11722510.1155/2014/126961WOS:000339762100001WOS000339762100001.pdfWOS000339762100001.epub7416129894680689190747925083303398123826683307440000-0001-9462-0240Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBiomed Research International2.5830,935info:eu-repo/semantics/openAccess2023-12-16T06:23:32Zoai:repositorio.unesp.br:11449/117225Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:30:34.519969Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
title |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
spellingShingle |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment Rabello Lima, Leonardo Coelho [UNESP] |
title_short |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
title_full |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
title_fullStr |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
title_full_unstemmed |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
title_sort |
Postactivation Potentiation Biases Maximal Isometric Strength Assessment |
author |
Rabello Lima, Leonardo Coelho [UNESP] |
author_facet |
Rabello Lima, Leonardo Coelho [UNESP] Dias Oliveira, Felipe Bruno [UNESP] Oliveira, Thiago Pires [UNESP] Assumpcao, Claudio de Oliveira [UNESP] Greco, Camila Coelho [UNESP] Cardozo, Adalgiso Croscato [UNESP] Denadai, Benedito Sergio [UNESP] |
author_role |
author |
author2 |
Dias Oliveira, Felipe Bruno [UNESP] Oliveira, Thiago Pires [UNESP] Assumpcao, Claudio de Oliveira [UNESP] Greco, Camila Coelho [UNESP] Cardozo, Adalgiso Croscato [UNESP] Denadai, Benedito Sergio [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rabello Lima, Leonardo Coelho [UNESP] Dias Oliveira, Felipe Bruno [UNESP] Oliveira, Thiago Pires [UNESP] Assumpcao, Claudio de Oliveira [UNESP] Greco, Camila Coelho [UNESP] Cardozo, Adalgiso Croscato [UNESP] Denadai, Benedito Sergio [UNESP] |
description |
Postactivation potentiation (PAP) is known to enhance force production. Maximal isometric strength assessment protocols usually consist of two or more maximal voluntary isometric contractions (MVCs). The objective of this study was to determine if PAP would influence isometric strength assessment. Healthy male volunteers (n = 23) performed two five-second MVCs separated by a 180-seconds interval. Changes in isometric peak torque (IPT), time to achieve it (tPTI), contractile impulse (CI), root mean square of the electromyographic signal during PTI (RMS), and rate of torque development (RTD), in different intervals, were measured. Significant increases in IPT (240.6 +/- 55.7 N.m versus 248.9 +/- 55.1 N.m), RTD (746 +/- 152 N.m.s(-1) versus 727 +/- 158 N.m.s(-1)), and RMS (59.1 +/- 12.2% RMSMAX versus 54.8 +/- 9.4% RMSMAX) were found on the second MVC. tPTI decreased significantly on the second MVC (2373 +/- 1200 ms versus 2784 +/- 1226 ms). We conclude that a first MVC leads to PAP that elicits significant enhancements in strength-related variables of a second MVC performed 180 seconds later. If disconsidered, this phenomenon might bias maximal isometric strength assessment, overestimating some of these variables. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2015-03-18T15:55:34Z 2015-03-18T15:55:34Z |
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://dx.doi.org/10.1155/2014/126961 Biomed Research International. New York: Hindawi Publishing Corporation, 7 p., 2014. 2314-6133 http://hdl.handle.net/11449/117225 10.1155/2014/126961 WOS:000339762100001 WOS000339762100001.pdf WOS000339762100001.epub 7416129894680689 1907479250833033 9812382668330744 0000-0001-9462-0240 |
url |
http://dx.doi.org/10.1155/2014/126961 http://hdl.handle.net/11449/117225 |
identifier_str_mv |
Biomed Research International. New York: Hindawi Publishing Corporation, 7 p., 2014. 2314-6133 10.1155/2014/126961 WOS:000339762100001 WOS000339762100001.pdf WOS000339762100001.epub 7416129894680689 1907479250833033 9812382668330744 0000-0001-9462-0240 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Biomed Research International 2.583 0,935 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7 application/epub+zip application/pdf |
dc.publisher.none.fl_str_mv |
Hindawi Publishing Corporation |
publisher.none.fl_str_mv |
Hindawi Publishing Corporation |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129212759932928 |