Vibration has a strong osteogenic effect. Vibration-induced bone formation is neuronally regulated. Vibration can also effectively enhance muscle strength and power. Previous studies have shown that vibration increases muscle electromyographic (EMG) activity. But, it has not been reported whether bone has an effect on the increase in muscle EMG activity caused by vibration or not. The aim of this study was to determine whether radius bone exposed to cyclic mechanical loading affects muscle electrical activity of contralateral untrained m. flexor carpi radialis in healthy adult volunteers.