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Med J Tabriz Uni Med Sciences Health Services. 2013;35(5): 66-71.
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Research

The Efficacy of the Whole Body Vibration (WBV) Training on Electromyography Indexes of Knee Extensor Muscles in Non-Athletic Girls

Mohammad Reza Kordi 1, Mohammad Hossein Alizadeh 2, Parisa Mazraeh Farahani 1, Fahimeh Kazemi 3*

1 Department of Exercise Physiology, School of Physical Education & Sport Sciences, University of Tehran, Tehran, Iran
2 Department of Health and Sports Medicine, School of Physical Education & Sport Sciences, University of Tehran, Tehran, Iran
3 School of Physical Education and Sport Sciences, Shahid Beheshti University, Tehran, Iran
*Corresponding Author: Email: kazemi.fahimeh@yahoo.de

Abstract

Backgrounds and Objectives: The Whole Body Vibration (WBV) training has been considered as a training tool for the athletes, non-athletes, elderly individuals. The aim of this study was to determine the effect of WBV training on electromyography indexes of knee extensor muscles in non-athletic girls. Materials and Methods: Twelve non-athletic student girls randomized into experimental (n=10) and control (n=10) groups. Amplitude and frequency of electrical waves related to right feet knee extensor muscles was measured in a Maximal Voluntary Isometric Contraction (MVC), one day before and after WBV training. The vibration group was treated for 4 weeks (3 times/ week) with 30 HZ frequency, 2.5 mm amplitude and in 5 situations of squat (knee 900, 1200, 1800, right feet and left feet). The time of each training set was 30 seconds followed by a 20 seconds as rest time between each set. Results: Results: There was no significant differences in amplitude and frequency of electrical waves of rectus femoris, vastus lateralis, vastus medialis muscles between both groups in pre- and post-tests (p>0.05). The significant differences was found in amplitude and frequency of electrical waves of rectus femoris, vastus lateralis, vastus medialis muscles in experimental group in pre- and post-tests (p<0.05). Conclusion: WBV training may affect the electromyography indexes of knee extensor muscles in non-athletic girls.
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Submitted: 19 Feb 2013
Accepted: 06 May 2013
ePublished: 25 Dec 2013
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