American Journal of Sports Science and Medicine
ISSN (Print): 2333-4592 ISSN (Online): 2333-4606 Website: Editor-in-chief: Ratko Pavlović
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American Journal of Sports Science and Medicine. 2017, 5(2), 38-43
DOI: 10.12691/ajssm-5-2-4
Open AccessArticle

The Effect of External Stimulus Produced by Vibration Stimulus Instrument on Body Sway

Hiroshi Hirai1, , Shinichi Demura2, Tamotsu Kitabayashi3 and Yoshimasa Matsuura1

1Faculty of Liberal Arts and Sciences, Osaka Prefecture University, Osaka, Japan

2College of Human and Social Sciences, Kanazawa University, Kanazawa, Japan

3Faculty of Science, Tokyo University of Science, Tokyo, Japan

Pub. Date: August 04, 2017

Cite this paper:
Hiroshi Hirai, Shinichi Demura, Tamotsu Kitabayashi and Yoshimasa Matsuura. The Effect of External Stimulus Produced by Vibration Stimulus Instrument on Body Sway. American Journal of Sports Science and Medicine. 2017; 5(2):38-43. doi: 10.12691/ajssm-5-2-4


This study aimed to examine the effect of right-left or front-back vibration stimulus during standing on body sway. Subjects were 10 healthy young male adults. They had no evidence or known history of a gait, posture or skeletal disorder. After a weak vibratory stimulus (20 Hz) for 1 min, subjects stood under the strong stimulus (70 Hz) of front-back or right-left vibratory for 1 min. The subjects were measured body sway for 1 min before and after the above vibratory stimulus. Four body-sway factors (unit time sway, front-back sway, left-right sway, and the high frequency band power) were used as evaluation parameters. A significant decrease was found only in a unit time sway factor after vibratory stimulus. A significant difference between front-back and right-left vibratory stimuli was found only in a left-right sway factor and the latter stimulus produced a large change. In conclusion, even in the vibratory stimulus with the same intensity, body sway decreases after front-back stimulus, but increases after right-left stimulus. In short, the effect of vibratory stimulus on posture control system may differ by the vibratory direction.

body sway vibration stimulus external stimulus

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