In this paper we review low frequency vibration therapy on healthy parsons. In order to investigate the effects of whole body vibration on the human body, we developed an automatic swing bed under a condition of 1 Hz in frequency, and we present brief summaries of our experimental studies relevant to whole body vibration performed on healthy persons. The most important result was that healthy parsons showed a significant effect in sense of equilibriumof healthy parsons after receiving whole body vibration on the automatic swing bed under a condition of 0.6 and 0.8 Hz in frequency.