Physical activity level does not influence the neuromuscular fatigue in adults

Frank Shiguemitsu Suzuki, Marcelo Martins Kalytczak, Cesar Augusto de Souza Casarin, Andrey Jorge Serra, Alexandre Lopes Evangelista, Paulo Henrique Marchetti, Fabiano Politti, Angelica Castilho Alonso, Aylton José Figueira Junior, Julien Baker, Danilo Sales Bocalini

Research output: Contribution to journalArticle

Abstract

Introduction:Fatigue during voluntary muscle contractions is a complex and multifactorial phenomenon associated with central changes and adaptations of the neuromuscular system.
Objective:The purpose of this study was to evaluate the fatigue induced by intermittent successive extension of the knee between active and inactive university students. Method: Twenty healthy men (≥18 years), voluntarily participated in this study. To determine the maximum voluntary isometric contraction (MVIC) of the knee extensors muscle group, three sets of isometric contractions of knee extension were performed for five seconds with five minutes of rest between sets. The fatigue protocol consisted of 10 sets of 10 maximal concentric contractions of the extensor on the right knee, performed at 75% of MVIC with an interval of 45".
Results:Significant reductions were observed (p<0.01), both in isometric strength (-34±4%) and the dynamic strength (-40 ± 3%). In addition, the slope of relationship strength x repetition was -0.79±0.07 Nm/repetitions and the magnitude of the effect reached -8.90.
Conclusion:The protocol was useful to induce peripheral fatigue, although muscle strength is greater in the active group. In both isometric and dynamic action, muscle fatigue did not differ between groups.
Original languageEnglish
JournalRevista Brasileira de Medicina do Esporte
Volume22
Issue number2
DOIs
Publication statusPublished - Mar 2016

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Isometric Contraction
Fatigue
Knee
Exercise
Muscle Fatigue
Muscle Strength
Muscle Contraction
Skeletal Muscle
Students
Muscles

Keywords

  • muscle strength
  • dynamometer
  • knee
  • isometric contraction

Cite this

Suzuki, F. S., Kalytczak, M. M., de Souza Casarin, C. A., Serra, A. J., Evangelista, A. L., Marchetti, P. H., ... Bocalini, D. S. (2016). Physical activity level does not influence the neuromuscular fatigue in adults. Revista Brasileira de Medicina do Esporte, 22(2). https://doi.org/10.1590/1517-869220162202150282
Suzuki, Frank Shiguemitsu ; Kalytczak, Marcelo Martins ; de Souza Casarin, Cesar Augusto ; Serra, Andrey Jorge ; Evangelista, Alexandre Lopes ; Marchetti, Paulo Henrique ; Politti, Fabiano ; Castilho Alonso, Angelica ; Figueira Junior, Aylton José ; Baker, Julien ; Bocalini, Danilo Sales. / Physical activity level does not influence the neuromuscular fatigue in adults. In: Revista Brasileira de Medicina do Esporte. 2016 ; Vol. 22, No. 2.
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abstract = "Introduction:Fatigue during voluntary muscle contractions is a complex and multifactorial phenomenon associated with central changes and adaptations of the neuromuscular system.Objective:The purpose of this study was to evaluate the fatigue induced by intermittent successive extension of the knee between active and inactive university students. Method: Twenty healthy men (≥18 years), voluntarily participated in this study. To determine the maximum voluntary isometric contraction (MVIC) of the knee extensors muscle group, three sets of isometric contractions of knee extension were performed for five seconds with five minutes of rest between sets. The fatigue protocol consisted of 10 sets of 10 maximal concentric contractions of the extensor on the right knee, performed at 75{\%} of MVIC with an interval of 45{"}.Results:Significant reductions were observed (p<0.01), both in isometric strength (-34±4{\%}) and the dynamic strength (-40 ± 3{\%}). In addition, the slope of relationship strength x repetition was -0.79±0.07 Nm/repetitions and the magnitude of the effect reached -8.90.Conclusion:The protocol was useful to induce peripheral fatigue, although muscle strength is greater in the active group. In both isometric and dynamic action, muscle fatigue did not differ between groups.",
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Suzuki, FS, Kalytczak, MM, de Souza Casarin, CA, Serra, AJ, Evangelista, AL, Marchetti, PH, Politti, F, Castilho Alonso, A, Figueira Junior, AJ, Baker, J & Bocalini, DS 2016, 'Physical activity level does not influence the neuromuscular fatigue in adults' Revista Brasileira de Medicina do Esporte, vol. 22, no. 2. https://doi.org/10.1590/1517-869220162202150282

Physical activity level does not influence the neuromuscular fatigue in adults. / Suzuki, Frank Shiguemitsu; Kalytczak, Marcelo Martins ; de Souza Casarin, Cesar Augusto; Serra, Andrey Jorge; Evangelista, Alexandre Lopes; Marchetti, Paulo Henrique ; Politti, Fabiano; Castilho Alonso, Angelica; Figueira Junior, Aylton José; Baker, Julien; Bocalini, Danilo Sales.

In: Revista Brasileira de Medicina do Esporte, Vol. 22, No. 2, 03.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Physical activity level does not influence the neuromuscular fatigue in adults

AU - Suzuki, Frank Shiguemitsu

AU - Kalytczak, Marcelo Martins

AU - de Souza Casarin, Cesar Augusto

AU - Serra, Andrey Jorge

AU - Evangelista, Alexandre Lopes

AU - Marchetti, Paulo Henrique

AU - Politti, Fabiano

AU - Castilho Alonso, Angelica

AU - Figueira Junior, Aylton José

AU - Baker, Julien

AU - Bocalini, Danilo Sales

PY - 2016/3

Y1 - 2016/3

N2 - Introduction:Fatigue during voluntary muscle contractions is a complex and multifactorial phenomenon associated with central changes and adaptations of the neuromuscular system.Objective:The purpose of this study was to evaluate the fatigue induced by intermittent successive extension of the knee between active and inactive university students. Method: Twenty healthy men (≥18 years), voluntarily participated in this study. To determine the maximum voluntary isometric contraction (MVIC) of the knee extensors muscle group, three sets of isometric contractions of knee extension were performed for five seconds with five minutes of rest between sets. The fatigue protocol consisted of 10 sets of 10 maximal concentric contractions of the extensor on the right knee, performed at 75% of MVIC with an interval of 45".Results:Significant reductions were observed (p<0.01), both in isometric strength (-34±4%) and the dynamic strength (-40 ± 3%). In addition, the slope of relationship strength x repetition was -0.79±0.07 Nm/repetitions and the magnitude of the effect reached -8.90.Conclusion:The protocol was useful to induce peripheral fatigue, although muscle strength is greater in the active group. In both isometric and dynamic action, muscle fatigue did not differ between groups.

AB - Introduction:Fatigue during voluntary muscle contractions is a complex and multifactorial phenomenon associated with central changes and adaptations of the neuromuscular system.Objective:The purpose of this study was to evaluate the fatigue induced by intermittent successive extension of the knee between active and inactive university students. Method: Twenty healthy men (≥18 years), voluntarily participated in this study. To determine the maximum voluntary isometric contraction (MVIC) of the knee extensors muscle group, three sets of isometric contractions of knee extension were performed for five seconds with five minutes of rest between sets. The fatigue protocol consisted of 10 sets of 10 maximal concentric contractions of the extensor on the right knee, performed at 75% of MVIC with an interval of 45".Results:Significant reductions were observed (p<0.01), both in isometric strength (-34±4%) and the dynamic strength (-40 ± 3%). In addition, the slope of relationship strength x repetition was -0.79±0.07 Nm/repetitions and the magnitude of the effect reached -8.90.Conclusion:The protocol was useful to induce peripheral fatigue, although muscle strength is greater in the active group. In both isometric and dynamic action, muscle fatigue did not differ between groups.

KW - muscle strength

KW - dynamometer

KW - knee

KW - isometric contraction

U2 - 10.1590/1517-869220162202150282

DO - 10.1590/1517-869220162202150282

M3 - Article

VL - 22

JO - Revista Brasileira de Medicina do Esporte

JF - Revista Brasileira de Medicina do Esporte

SN - 1517-8692

IS - 2

ER -

Suzuki FS, Kalytczak MM, de Souza Casarin CA, Serra AJ, Evangelista AL, Marchetti PH et al. Physical activity level does not influence the neuromuscular fatigue in adults. Revista Brasileira de Medicina do Esporte. 2016 Mar;22(2). https://doi.org/10.1590/1517-869220162202150282