Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/265545 |
Resumo: | Abstract: Resistance training is often recommended for combined increases in traditional and alternative hamstrings-to-quadriceps (H:Q) ratios in order to reduce knee strength imbalance and associated hamstrings and knee ligament injury risk. The aim of this study was to investigate the effect of different concentric and eccentric resistance training programs on traditional and alternative H:Q ratios. Forty male volunteers were assigned to one of 4 groups: concentric quadriceps and concentric hamstrings (CON/CON, n = 10), eccentric quadriceps and eccentric hamstrings (ECC/ECC, n = 10), concentric quadriceps and eccentric hamstrings (CON/ECC, n = 10), or no training (control (CNTRL), n = 10). Traditional conventional (CR) and functional (FR), alternative rate of torque development (RTD), muscle size (MS), and muscle activation (MA) H:Q ratios were measured before and after six weeks of unilateral nondominant knee extension–flexion resistance training performed on an isokinetic dynamometer. The ECC/ECC training significantly increased FR (pre = 0.75 ± 0.11; post = 0.85 ± 0.15), whereas the lack of training (CNTRL) decreased the RTD H:Q ratio (pre = 1.10 ± 0.67; post = 0.73 ± 0.33). There were no differences between groups for the other traditional and alternative ratios following resistance training protocols. These findings suggest eccentric exercise for quadriceps and hamstrings as the most beneficial training program for inducing increases in the traditional FR. However, different resistance training strategies may be needed to also elicit increases in the alternative RTD, MS, and MA H:Q ratios for fully restoring muscle balance and reducing potential hamstrings and knee ligament injury risk. |
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Ruas, Cassio VictoraPinto, Ronei SilveiraHaff, Guy GregoryLima, Camila D.Brown, Lee E.2023-09-30T03:42:04Z20192075-4663http://hdl.handle.net/10183/265545001171376Abstract: Resistance training is often recommended for combined increases in traditional and alternative hamstrings-to-quadriceps (H:Q) ratios in order to reduce knee strength imbalance and associated hamstrings and knee ligament injury risk. The aim of this study was to investigate the effect of different concentric and eccentric resistance training programs on traditional and alternative H:Q ratios. Forty male volunteers were assigned to one of 4 groups: concentric quadriceps and concentric hamstrings (CON/CON, n = 10), eccentric quadriceps and eccentric hamstrings (ECC/ECC, n = 10), concentric quadriceps and eccentric hamstrings (CON/ECC, n = 10), or no training (control (CNTRL), n = 10). Traditional conventional (CR) and functional (FR), alternative rate of torque development (RTD), muscle size (MS), and muscle activation (MA) H:Q ratios were measured before and after six weeks of unilateral nondominant knee extension–flexion resistance training performed on an isokinetic dynamometer. The ECC/ECC training significantly increased FR (pre = 0.75 ± 0.11; post = 0.85 ± 0.15), whereas the lack of training (CNTRL) decreased the RTD H:Q ratio (pre = 1.10 ± 0.67; post = 0.73 ± 0.33). There were no differences between groups for the other traditional and alternative ratios following resistance training protocols. These findings suggest eccentric exercise for quadriceps and hamstrings as the most beneficial training program for inducing increases in the traditional FR. However, different resistance training strategies may be needed to also elicit increases in the alternative RTD, MS, and MA H:Q ratios for fully restoring muscle balance and reducing potential hamstrings and knee ligament injury risk.application/pdfengSports. Basileia. Vol. 7, n.10, 221 (Oct. 2019) p. 1-14Tendões dos Músculos IsquiotibiaisMúsculosEquilíbrioTreinamento de resistenciaLesões do esporte : Prevenção & controleMuscle sizeRate of torque developmentMuscle activationPeak torqueH:Q ratioMuscle imbalanceResistance trainingInjury preventionEffects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratiosEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001171376.pdf.txt001171376.pdf.txtExtracted Texttext/plain52304http://www.lume.ufrgs.br/bitstream/10183/265545/2/001171376.pdf.txt0c1a50e5b7eb8c00a7d0ba239b93d15fMD52ORIGINAL001171376.pdfTexto completo (inglês)application/pdf1098371http://www.lume.ufrgs.br/bitstream/10183/265545/1/001171376.pdf6bfa91018b6b1b8036a19607c37f4475MD5110183/2655452023-10-01 03:38:48.683317oai:www.lume.ufrgs.br:10183/265545Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-10-01T06:38:48Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
title |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
spellingShingle |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios Ruas, Cassio Victora Tendões dos Músculos Isquiotibiais Músculos Equilíbrio Treinamento de resistencia Lesões do esporte : Prevenção & controle Muscle size Rate of torque development Muscle activation Peak torque H:Q ratio Muscle imbalance Resistance training Injury prevention |
title_short |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
title_full |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
title_fullStr |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
title_full_unstemmed |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
title_sort |
Effects of different combinations of concentric and eccentric resistance training programs on traditional and alternative hamstrings-to-quadriceps ratios |
author |
Ruas, Cassio Victora |
author_facet |
Ruas, Cassio Victora Pinto, Ronei Silveira Haff, Guy Gregory Lima, Camila D. Brown, Lee E. |
author_role |
author |
author2 |
Pinto, Ronei Silveira Haff, Guy Gregory Lima, Camila D. Brown, Lee E. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ruas, Cassio Victora Pinto, Ronei Silveira Haff, Guy Gregory Lima, Camila D. Brown, Lee E. |
dc.subject.por.fl_str_mv |
Tendões dos Músculos Isquiotibiais Músculos Equilíbrio Treinamento de resistencia Lesões do esporte : Prevenção & controle |
topic |
Tendões dos Músculos Isquiotibiais Músculos Equilíbrio Treinamento de resistencia Lesões do esporte : Prevenção & controle Muscle size Rate of torque development Muscle activation Peak torque H:Q ratio Muscle imbalance Resistance training Injury prevention |
dc.subject.eng.fl_str_mv |
Muscle size Rate of torque development Muscle activation Peak torque H:Q ratio Muscle imbalance Resistance training Injury prevention |
description |
Abstract: Resistance training is often recommended for combined increases in traditional and alternative hamstrings-to-quadriceps (H:Q) ratios in order to reduce knee strength imbalance and associated hamstrings and knee ligament injury risk. The aim of this study was to investigate the effect of different concentric and eccentric resistance training programs on traditional and alternative H:Q ratios. Forty male volunteers were assigned to one of 4 groups: concentric quadriceps and concentric hamstrings (CON/CON, n = 10), eccentric quadriceps and eccentric hamstrings (ECC/ECC, n = 10), concentric quadriceps and eccentric hamstrings (CON/ECC, n = 10), or no training (control (CNTRL), n = 10). Traditional conventional (CR) and functional (FR), alternative rate of torque development (RTD), muscle size (MS), and muscle activation (MA) H:Q ratios were measured before and after six weeks of unilateral nondominant knee extension–flexion resistance training performed on an isokinetic dynamometer. The ECC/ECC training significantly increased FR (pre = 0.75 ± 0.11; post = 0.85 ± 0.15), whereas the lack of training (CNTRL) decreased the RTD H:Q ratio (pre = 1.10 ± 0.67; post = 0.73 ± 0.33). There were no differences between groups for the other traditional and alternative ratios following resistance training protocols. These findings suggest eccentric exercise for quadriceps and hamstrings as the most beneficial training program for inducing increases in the traditional FR. However, different resistance training strategies may be needed to also elicit increases in the alternative RTD, MS, and MA H:Q ratios for fully restoring muscle balance and reducing potential hamstrings and knee ligament injury risk. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019 |
dc.date.accessioned.fl_str_mv |
2023-09-30T03:42:04Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/265545 |
dc.identifier.issn.pt_BR.fl_str_mv |
2075-4663 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001171376 |
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2075-4663 001171376 |
url |
http://hdl.handle.net/10183/265545 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Sports. Basileia. Vol. 7, n.10, 221 (Oct. 2019) p. 1-14 |
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