Differential effects of ankle position on isokinetic knee extensor and flexor strength gains during strength training

Kim, Kyoung; Cha, Yong-Jun; Fell, Dennis W.

doi:10.3233/ies-160617

Cited by 7 publications

(12 citation statements)

References 10 publications

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“…However, a previous study found the ankle position had no impact on the electromyography activity of the hamstring and gastrocnemius, and suggested that by stretching the gastrocnemius due to ankle dorsiflexion, the gastrocnemius muscle length was extended to a sufficient position in the length-tension relationship, allowing more force to be produced during knee flexion (Croce et al, 2000). It is also generally believed that the ankle position affects knee flexion training and strength (Kim et al, 2016). Kim et al (Kim et al, 2016) reported that the maximal concentric knee flexion torque (angular velocity of 60°/s) was 29-59% greater after four weeks of isokinetic knee flexion training with the ankle dorsiflexed position than training with the ankle plantarflexed position.…”

Section: Introductionmentioning

confidence: 99%

“…It is also generally believed that the ankle position affects knee flexion training and strength (Kim et al, 2016). Kim et al (Kim et al, 2016) reported that the maximal concentric knee flexion torque (angular velocity of 60°/s) was 29-59% greater after four weeks of isokinetic knee flexion training with the ankle dorsiflexed position than training with the ankle plantarflexed position. These results suggest that performing NHE strength testing with the ankle dorsiflexed position could produce a greater eccentric force.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise

Nishida¹,

Ito²,

Ohishi³

et al. 2021

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Peak eccentric force during the Nordic hamstring exercise (NHE) is recognized as a predictive factor for hamstring strain injury (HSI). During the NHE, the knee flexor muscles are eccentrically contracting to resist the knee joint extension. Therefore, it is thought that the action of the gastrocnemius muscle, and thus the ankle position, influences peak eccentric force during the NHE. However, the effect of ankle position on peak eccentric force during the NHE remains unclear. Therefore, we investigated the effect of ankle position on peak eccentric force during the NHE in a cohort of 50 healthy young male rugby players (mean age, 18.7 ± 1.2 years; mean body mass, 81.7 ± 15.2 kg; height, 1.72 ± 0.06 m) with no history of HSI. Each participant performed NHE strength testing with the ankle dorsiflexed or plantarflexed position and was instructed to fall forward as far as possible within 3 s. Peak eccentric force, reported relative to body mass (N/kg), of both legs was recorded, and the mean values of both legs were compared in both ankle positions. The mean peak eccentric force was significantly greater with the ankle plantarflexed position than the dorsiflexed position (3.8 ± 1.1 vs. 3.5 ± 1.1 N/kg, respectively, p = 0.049). These results indicate that ankle position should be carefully considered when measuring peak eccentric force during the NHE and performing NHE training.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise

Nishida¹,

Ito²,

Ohishi³

et al. 2021

jsportscimed

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“…Apesar do estudo de Kim et al (2016) terem demonstrado maior aumento da força de flexão de joelho com dorsiflexão após período de treinamento, o protocolo de intervenção foi efetuado em isocinético com a realização de contrações concêntricas. Esse método de intervenção se distancia do que é realizado em condições habituais de treinamento, onde se realizam contrações excêntricas-concêntricas que, em alguns momentos, são feitas até a falha muscular.…”

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“…Os dados literários disponíveis até o momento mostram que o músculo gastrocnêmio parece ser um influente flexor secundário de joelho quando o tornozelo está em dorsiflexão, evidenciando que tanto em avaliações agudas como em mensurações a longo prazo, quando o tornozelo está em dorsiflexão o torque de flexão de joelho é maior. Porém, apenas um artigo avaliou o desenvolvimento da força dos isquiotibiais, em diferentes posições de tornozelo, através de um período de treinamento.Nessa conjuntura, o estudo deKim et al (2016), realizou o protocolo de intervenção em dinamômetro isocinético, distanciando-se do que habitualmente é realizado nos treinos de força na sala de musculação ou centros de treinamentos, tornando-se necessário mais informações acerca do desenvolvimento da força. Além disso, durante esse estudo para comparar as diferentes condições utilizaram-se pessoas distintas.…”

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“…treinamento, de modo que os ganhos de força são específicos para o movimento que é treinado(SALE, 1988). A combinação destes fatores pode ser uma possível explicação na diferença considerável nos dados encontrados em nossa pesquisa e os apresentados porKim et al (2016). Além disto, em uma meta-análise realizada porRalston et al (2017), apresentaramgerado para a realização do movimento de flexão de joelho.…”

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A posição do tornozelo durante o exercício mesa flexora não influencia na ativação muscular dos isquiotibiais e não interfere no ganho de força e hipertrofia

Cadeo¹

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Primeiramente agradeço a Deus por guiar meus passos e me orientar em minhas escolhas ao longo desse processo de amadurecimento pessoal e acadêmico.A minha família por me oferecerem todo o suporte para que eu realizasse e concluísse este projeto.Ao meu namorado Rodolfo Luiz Neves por não medir esforços em me auxiliar em tudo que foi preciso.Ao meu orientador Prof. Dr. Matheus Machado Gomes, pelos inúmeros ensinamentos, e principalmente pela paciência em me orientar em toda a trajetória até aqui. Aos professores daEscola de Educação Física e Esporte de Ribeirão Preto (EEFERP) e da banca examinadora. Aos participantes do Grupo de Estudos Neuromotores do Movimento Humano (GENEMOH), do Laboratório de Biomecânica e Controle Motor (LABIOCOM) pela amizade, colaboração científica e desenvolvimento intelectual. E aos voluntários que gentilmente participaram dessa pesquisa. Palavras-chave: Eletromiografia; Posição de tornozelo; Hipertrofia muscular; Relação comprimento-tensão; Isquiotibiais.

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Effect of different ankle joint positions on medial gastrocnemius muscle fiber strains during isometric plantarflexion

Cunnane,

Sinha,

Malis

et al. 2023

Sci Rep

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Muscle force production is influenced by muscle fiber and aponeurosis architecture. This prospective cohort study utilizes special MR imaging sequences to examine the structure–function in-vivo in the Medial Gastrocnemius (MG) at three-ankle angles (dorsiflexion, plantar flexion—low and high) and two sub-maximal levels of maximum voluntary contraction (25% and 50%MVC). The study was performed on 6 young male participants. Muscle fiber and aponeurosis strain, fiber strain normalized to force, fiber length and pennation angle (at rest and peak contraction) were analyzed for statistical differences between ankle positions and %MVC. A two-way repeated measures ANOVA and post hoc Bonferroni-adjusted tests were conducted for normal data. A related samples test with Friedman’s 2-way ANOVA by ranks with corrections for multiple comparisons was conducted for non-normal data. The dorsiflexed ankle position generated significantly higher force with lower fiber strain than the plantarflexed positions. Sarcomere length extracted from muscle fiber length at each ankle angle was used to track the location on the Force–Length curve and showed the MG operates on the curve’s ascending limb. Muscle force changes predicted from the F-L curve going from dorsi- to plantarflexion was less than that experimentally observed suggesting other determinants of force changes with ankle position.

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Differential effects of ankle position on isokinetic knee extensor and flexor strength gains during strength training

Cited by 7 publications

References 10 publications

The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise

The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise

A posição do tornozelo durante o exercício mesa flexora não influencia na ativação muscular dos isquiotibiais e não interfere no ganho de força e hipertrofia

Effect of different ankle joint positions on medial gastrocnemius muscle fiber strains during isometric plantarflexion

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