TY - JOUR
T1 - Whole body vibration in the static modified push-up position in untrained healthy women stimulates neuromuscular system potentiating increased handgrip myogenic response
AU - Cristino de Souza, Ana Lúcia
AU - Mendonça, Vanessa Amaral
AU - Coelho de Oliveira, Ana Carolina
AU - Ferreira da Fonseca, Sueli
AU - Mello Santos, Luciana Martins
AU - Cunha Fernandes, José Sebastião
AU - Leite, Hércules Ribeiro
AU - Luiz de Mendonça Martins, Fábio
AU - Márcia dos Santos, Jousielle
AU - de Fátima Silva, Angélica
AU - Soares, Bruno Alvarenga
AU - César Ribeiro, Vanessa Gonçalves
AU - Scheidt Figueiredo, Pedro Henrique
AU - Oliveira, Vinicius Cunha
AU - Bernardo-Filho, Mario
AU - Sartorio, Alessandro
AU - Rodrigues Lacerda, Ana Cristina
N1 - Funding Information:
This work was supported in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001, Fundação de Amparo à pesquisa de Minas Gerais (FAPEMIG) , Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) .
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10
Y1 - 2020/10
N2 - Objective: To investigate the acute effect of whole-body vibration (WBV) on handgrip strength (HS) and electromyographic activity of the flexor digitorum superficialis muscle of healthy women in the static push-up position. Methods: Twenty-eight women received four experimental tests in a randomized order: A) Control – rest in seating position with feet on the floor and hands in the supine position on the lower limbs. There was no vibration stimulus; B) Placebo – push-up position with their hands on the vibratory platform that remained disconnected, but with a sonorous stimulus mimicking the vibration; C) Low vibration and D) High vibration – push-up position with their hands on the vibratory platform using one of the vibratory stimulus intensity: low vibration: 25 Hz/2 mm/49.30 m s−2; or high vibration: 45 Hz/2 mm/159.73 m s−2. Participants remained 5 min in each situation. HS and electromyography (EMG) were performed at baseline and after all four experimental tests. The index of neural efficiency (i.e. the ratio between EMG and HS) was also calculated to determine the efficiency of muscle contraction. Statistical analysis was performed by ANOVA two-way design mixed test with Tukey's post hoc test, being considered significant p < 0.05. Results: High vibration increased HS compared with all the other experimental tests (p = 0.0006, F = 6.03). There was a reduction of EMG activity of the flexor digitorum superficialis muscle only after high vibration (p = 0.0135, F = 6.22), which was accompanied by lower values of the index of neural efficiency after intervention (between-group difference, p = 0.0002, F = 0.674). Conclusion: WBV in the push-up position has an acute positive effect on HS accompanied by a lower index of neural efficiency, providing a better efficiency of muscle contraction.
AB - Objective: To investigate the acute effect of whole-body vibration (WBV) on handgrip strength (HS) and electromyographic activity of the flexor digitorum superficialis muscle of healthy women in the static push-up position. Methods: Twenty-eight women received four experimental tests in a randomized order: A) Control – rest in seating position with feet on the floor and hands in the supine position on the lower limbs. There was no vibration stimulus; B) Placebo – push-up position with their hands on the vibratory platform that remained disconnected, but with a sonorous stimulus mimicking the vibration; C) Low vibration and D) High vibration – push-up position with their hands on the vibratory platform using one of the vibratory stimulus intensity: low vibration: 25 Hz/2 mm/49.30 m s−2; or high vibration: 45 Hz/2 mm/159.73 m s−2. Participants remained 5 min in each situation. HS and electromyography (EMG) were performed at baseline and after all four experimental tests. The index of neural efficiency (i.e. the ratio between EMG and HS) was also calculated to determine the efficiency of muscle contraction. Statistical analysis was performed by ANOVA two-way design mixed test with Tukey's post hoc test, being considered significant p < 0.05. Results: High vibration increased HS compared with all the other experimental tests (p = 0.0006, F = 6.03). There was a reduction of EMG activity of the flexor digitorum superficialis muscle only after high vibration (p = 0.0135, F = 6.22), which was accompanied by lower values of the index of neural efficiency after intervention (between-group difference, p = 0.0002, F = 0.674). Conclusion: WBV in the push-up position has an acute positive effect on HS accompanied by a lower index of neural efficiency, providing a better efficiency of muscle contraction.
KW - Electromyography
KW - Exposure to vibration
KW - Grip strength
KW - Muscular performance
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U2 - 10.1016/j.jbmt.2020.06.021
DO - 10.1016/j.jbmt.2020.06.021
M3 - Article
C2 - 33218516
AN - SCOPUS:85090192280
VL - 24
SP - 233
EP - 238
JO - Journal of Bodywork and Movement Therapies
JF - Journal of Bodywork and Movement Therapies
SN - 1360-8592
IS - 4
ER -