Adv Exerc Sports Physiol, 2002; 8/4: 83-86

Effect of Whole Body Vibration Stimulus and Voluntary Contraction on Motoneuron Pool

Year: 2002

NISHIHIRA Y, IWASAKI T, HATTA A, WASAKA T, KANEDA T, KUROIWA K, AKIYAMA S, KIDA T, RYOL K S

Abstract

We investigated the influence of transient whole body vibration and voluntary contraction on the motomeuron pool. Electromyographic recordings were obtained from the soleus muscle of 17 healthy subjects using surface electrodes placed bilaterally. Whole body vibration was applied in three sets of 3 minutes each using a training device, Galileo 2000 (Novotec Gmbh, Gemany). The H-reflex was elicited by electrically stimulating the right posterior tibial nerve, as subjects sat in a chair in a relaxed position. The H/M ratio was significantly increased after vibration compared to before vibration. This suggests an increase in the excitability of the alpha motoneuron pool. In this study, it may be considered that the H/M ratio increased as a result of the integration of influences from both whole body vibration and voluntary contraction.

Keywords: H-Reflex
GID: 162; Last update: 01.12.2007
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