In this paper, we investigated the effect of muscle strength and muscular activity in whole-body vibration. We performed experiment with 20-subjects and divided two groups. One group is training group with whole-body vibration; the other is control group with non-vibration. Training group is supplied with whole-body vibration 4-days and 1-day measure knee joint torque a week and proceeded total 8-weeks. The results indicated that knee joint peak torque improved significantly in training group when knee extension and flexion using BIODEX unlike control group. Because that whole-body vibration may keep muscle tension and stimulate muscular fiber. This study can be used new training mode to normal people and rehabilitation or the elderly.