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Type: Artigo de Periódico
Title: Individual responses to different vibration frequencies identified by electromyography and dynamometry in different types of vibration application
Authors: Mariana Paulino Oliveira
Hans-Joachim Karl Menzel
Darryl Cochrane
Marcos Daniel Motta Drummond
Carlo Demicheli
Guilherme Menezes Lage
Bruno Pena Couto
Abstract: Oliveira, MP, Menzel, H-JK, Cochrane, DJ, Drummond, MD, Demicheli, C, Lage, G, and Couto, BP. Individual responses to different vibration frequencies identified by electromyography and dynamometry in different types of vibration application. J Strength Cond Res 35(6): 1748–1759, 2021—The application of mechanical vibration is a common neuromuscular training technique used in sports training programs to generate acute increases in muscle strength. The principal aim of the study was to compare the individual optimal vibration frequency (IOVF) identified by electromyography (EMG) activity and force production in strength training. Twenty well-trained male volunteers (age: 23.8 ± 3.3 years) performed a familiarization and 2 interventions sessions, which included 5 maximal voluntary contractions (MVCs) of the elbow flexors with a duration of 10 seconds and 5-minute intervals between each MVC. The first MVC was performed without vibration followed by 4 randomized MVCs with application of vibration in the direction of the resultant muscle forces' vector (VDF) or whole-body vibration (WBV) at frequencies of 10, 20, 30, or 40 Hz. The mechanical vibration stimulus was superimposed during the MVC. Individual optimal vibration frequency, as identified by EMG, did not coincide with IOVF identified by force production; low agreement was observed between the vibration frequencies in generating the higher EMG activity, maximal force, and root mean square of force. These findings suggest that the magnitude of the vibratory stimulus response is individualized. Therefore, if the aim is to use acute vibration in conjunction with strength training, a preliminary vibration exposure should be conducted to determine the individualized vibratory stimulus of the subject, so that training effects can be optimized.
Subject: Vibração
Força muscular
Exercícios físicos
Exercício isométrico
language: eng Brasil
Publisher: Universidade Federal de Minas Gerais
Publisher Initials: UFMG
metadata.dc.publisher.department: EEF - DEPARTAMENTO DE ESPORTES
Rights: Acesso Restrito
Issue Date: Jun-2021
metadata.dc.relation.ispartof: Journal of Strength and Conditioning Research
Appears in Collections:Artigo de Periódico

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