The EMG activity-acceleration relationship to quantify the optimal vibration load when applying synchronous whole-body vibration

Riccardo Di Giminiani, Francesco Masedu, Johnny Padulo, Jozsef Tihanyi, Marco Valenti

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Purpose: To date are lacking methodological approaches to individualizing whole-body vibration (WBV) intensity. The aim of this study was: (1) to determine the surface-electromyography-root-mean-square (sEMGRMS)-acceleration load relationship in the vastus lateralis (VL), vastus medialis (VM), rectus femoris (RF), lateral gastrocnemius (LG) muscles during synchronous WBV, and (2) to assess the reliability of the acceleration corresponding to the maximal sEMGRMS. Methods: Twenty-five sportsman voluntarily took part in this study with a single-group, repeated-measures design. All subjects postured themselves in an isometric half-squat during nine trials in the following conditions: no vibrations and random vibrations of different acceleration loads (from 0.12 to 5.72g). Results: The sEMGRMS were dependent on the acceleration loads in the VL (p=0.0001), LG (p=0.0001) and VM (p=0.011) muscles; while RF was not affected by the acceleration loads (p=0.508). The comparisons among the sEMGRMS-accelerations relationships revealed a significant difference between the LG and the others muscles (p=0.001). No significant difference was found between the different thigh muscles (p>0.05). The intra-class correlation coefficient ranged from 0.87 to 0.99 for the measurements performed on the LG, VL and VM. Conclusions: The sEMGRMS-acceleration relationship in the VL, VM and LG is a reliable test to individualize the WBV intervention.

Original languageEnglish
Pages (from-to)853-859
Number of pages7
JournalJournal of Electromyography and Kinesiology
Volume25
Issue number6
DOIs
Publication statusPublished - Dec 2015

Keywords

  • Dose-response
  • Exercise test
  • Individualization
  • Internal-external load
  • Methods
  • Reliability

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

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