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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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THE EFFECT OF WHOLE-BODY VIBRATION FREQUENCY AND AMPLITUDE ON THE MYOELECTRIC ACTIVITY OF VASTUS MEDIALIS AND VASTUS LATERALIS |
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Piotr Krol1  ,
Magdalena Piecha1, Kajetan Slomka2, Grzegorz Sobota2,
Anna Polak1 and Grzegorz Juras2 |
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1Department of Physiotherapy Basics, and 2Department of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland |
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© Journal of Sports Science and Medicine (2011) 10, 169 - 174 |
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| ABSTRACT | |||
| The aim of this study was to evaluate the efficiency of training
protocols for whole body vibration (WBV) training through the modulation
of the frequency and amplitude of vibration. Despite the large number of
studies regarding effects of such training, there is still lack of knowledge
regarding optimum training protocols. The study analyzed the influence of
whole-body vibration parameters (i.e., the frequency and amplitude) on the
myoelectric activity of vastus lateralis and vastus medialis in 29 females
with the use of electromyography (EMG). The first and second of the eight
consecutive trials were performed without vibrations; the remaining six
trials were performed in a randomized order on a platform vibrating at different
amplitude (2mm and 4mm) and frequency (20 Hz, 40 Hz and 60 Hz) combinations.
The results revealed significantly higher EMG amplitude of both muscles
during the vibration as compared with the non- vibrated trials (trial 1
and 2). Furthermore, the EMG activity significantly increased both with
the amplitude and frequency, being the highest when the frequency and amplitude
of reached 60 Hz and 4 mm, respectively. The study aims to determine the
optimal vibration parameters in the aspect of purposeful stimulation of
chosen leg muscles. Based on the results of the presented investigation,
sports trainers and physiotherapists may be able to optimize training programs
involving vibration platforms. Key words: EMG, vibration training, whole body vibration (WBV), muscle activity. |
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