Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p307 |
Resumo: | The aim of this study was to evaluate force, rate of force development and knee extensor neuromuscular efficiency asymmetries in children, adults and elderly. Each subject performed maximal isometric voluntary contractions (MIVC) and submaximal trials (15% and 30% MIVC). Maximal force, rate of force development (RFD) and neuro-muscular efficiency were evaluated and compared between groups and between preferred and non-preferred lower limb. Children (mean age 8.4, SD 0.7 yrs), female adults (mean age 23.2, SD 3.5 yrs) and elderly (mean age 65.9 SD 7.0 yrs) were evaluated. RFD was higher in young adults, and similar between children and elderly. Neuromuscular efficiency decreased significantly with aging (P<0.05). Inter-limb asymmetries were observed for force and RFD in favor of the preferred lower limb in the elderly (P<0.05). Force and RFD asymmetries in the elderly are supported by the right hemisphere-aging model contribut-ing to increased motor asymmetries. It was suggested that both physical assessment and training in the elderly should consider asymmetries that apparently are inherent to the aging process. A simple protocol for maximal and submaximal force assessment may be useful for delineating impairments in force and power in the elderly. |
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Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groupsAssimetrias na força muscular isométrica, taxa de desenvolvimento de força e na eficiência neuromuscular de extensores do joelho em diferentes faixas de idadeThe aim of this study was to evaluate force, rate of force development and knee extensor neuromuscular efficiency asymmetries in children, adults and elderly. Each subject performed maximal isometric voluntary contractions (MIVC) and submaximal trials (15% and 30% MIVC). Maximal force, rate of force development (RFD) and neuro-muscular efficiency were evaluated and compared between groups and between preferred and non-preferred lower limb. Children (mean age 8.4, SD 0.7 yrs), female adults (mean age 23.2, SD 3.5 yrs) and elderly (mean age 65.9 SD 7.0 yrs) were evaluated. RFD was higher in young adults, and similar between children and elderly. Neuromuscular efficiency decreased significantly with aging (P<0.05). Inter-limb asymmetries were observed for force and RFD in favor of the preferred lower limb in the elderly (P<0.05). Force and RFD asymmetries in the elderly are supported by the right hemisphere-aging model contribut-ing to increased motor asymmetries. It was suggested that both physical assessment and training in the elderly should consider asymmetries that apparently are inherent to the aging process. A simple protocol for maximal and submaximal force assessment may be useful for delineating impairments in force and power in the elderly.Neste estudo, avaliamos assimetrias na força, taxa de desenvolvimento de força (TDF) e eficiência neuromuscular de extensores de joelho em crianças, adultos e idosos. Cada sujeito realizou contrações isométricas voluntárias máximas e submáximas (15% e 30% da contração isométrica voluntária máxima). Força máxima, TDF e eficiência neuromuscular foram avaliadas e comparadas entre os grupos e entre perna preferida e não-preferida. Foram avaliadas crianças (média de idade de 8,4 ± 0,7 anos), adultos (média de idade de 23,2 ± 3,5 anos) e idosos (média de idade de 65,9 ± 7,0 anos), do sexo feminino. A TDF foi maior em adultos jovens, e similar entre crianças e idosos. A eficiência neuromuscular diminuiu significativamente com o envelhecimento (P<0,05). Foram observadas assimetrias em força e TDF em favor da perna preferida em idosos (P<0,05). Assimetrias em força e TDF em idosos podem ser justificadas por fatores neurais, como a mudança em favor do hemisfério cerebral direito, levando a assimetrias motoras. Este resultado sugere que tanto a avaliação física quanto o treinamento em idosos deve levar em consideração assimetrias, que parecem ser inerentes ao processo de envelhecimento. Assim, um protocolo simples para avaliar a força máxima e submáxima pode ser útil para quantificar déficits de força e potência em idososUniversidade Federal de Santa Catarina. Florianópolis, SC. Brasil2014-03-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion"Avaliado por Pares",Cross-sectional studyAvaliado por ParesArtigos Originaisapplication/pdfhttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p30710.1590/1980-0037.2014v16n3p307Brazilian Journal of Kinanthropometry and Human Performance; Vol. 16 No. 3 (2014); 307-315Revista Brasileira de Cineantropometria e Desempenho Humano; v. 16 n. 3 (2014); 307-3151980-00371415-8426reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCenghttps://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p307/26411Schimidt, Helen LMachado, Álvaro SVaz, Marco ACarpes, Felipe Pinfo:eu-repo/semantics/openAccess2020-01-22T11:51:50Zoai:periodicos.ufsc.br:article/29749Revistahttps://periodicos.ufsc.br/index.php/rbcdh/PUBhttps://periodicos.ufsc.br/index.php/rbcdh/oairbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br1980-00371415-8426opendoar:2020-01-22T11:51:50Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups Assimetrias na força muscular isométrica, taxa de desenvolvimento de força e na eficiência neuromuscular de extensores do joelho em diferentes faixas de idade |
title |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
spellingShingle |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups Schimidt, Helen L |
title_short |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
title_full |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
title_fullStr |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
title_full_unstemmed |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
title_sort |
Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups |
author |
Schimidt, Helen L |
author_facet |
Schimidt, Helen L Machado, Álvaro S Vaz, Marco A Carpes, Felipe P |
author_role |
author |
author2 |
Machado, Álvaro S Vaz, Marco A Carpes, Felipe P |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Schimidt, Helen L Machado, Álvaro S Vaz, Marco A Carpes, Felipe P |
description |
The aim of this study was to evaluate force, rate of force development and knee extensor neuromuscular efficiency asymmetries in children, adults and elderly. Each subject performed maximal isometric voluntary contractions (MIVC) and submaximal trials (15% and 30% MIVC). Maximal force, rate of force development (RFD) and neuro-muscular efficiency were evaluated and compared between groups and between preferred and non-preferred lower limb. Children (mean age 8.4, SD 0.7 yrs), female adults (mean age 23.2, SD 3.5 yrs) and elderly (mean age 65.9 SD 7.0 yrs) were evaluated. RFD was higher in young adults, and similar between children and elderly. Neuromuscular efficiency decreased significantly with aging (P<0.05). Inter-limb asymmetries were observed for force and RFD in favor of the preferred lower limb in the elderly (P<0.05). Force and RFD asymmetries in the elderly are supported by the right hemisphere-aging model contribut-ing to increased motor asymmetries. It was suggested that both physical assessment and training in the elderly should consider asymmetries that apparently are inherent to the aging process. A simple protocol for maximal and submaximal force assessment may be useful for delineating impairments in force and power in the elderly. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-03-28 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion "Avaliado por Pares", Cross-sectional study Avaliado por Pares Artigos Originais |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p307 10.1590/1980-0037.2014v16n3p307 |
url |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p307 |
identifier_str_mv |
10.1590/1980-0037.2014v16n3p307 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/rbcdh/article/view/1980-0037.2014v16n3p307/26411 |
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 |
Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil |
publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil |
dc.source.none.fl_str_mv |
Brazilian Journal of Kinanthropometry and Human Performance; Vol. 16 No. 3 (2014); 307-315 Revista Brasileira de Cineantropometria e Desempenho Humano; v. 16 n. 3 (2014); 307-315 1980-0037 1415-8426 reponame:Revista Brasileira de Cineantropometria & Desempenho Humano (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
collection |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Cineantropometria & Desempenho Humano (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
rbcdh@contato.ufsc.br || portaldeperiodicos.bu@contato.ufsc.br |
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1789435123521814528 |