It rotates around an anteroposterior horizontal axis, so when the feet are further from the axis it results in a larger vibration peak-to-peak displacement. The unique mechanical aspects of SV and SAV machines can influence different neuromuscular responses. It has reported that; electromyography (EMG) of vastus lateral is and gastrocnemius was higher during SAV than SV; tibialis anterior EMG was significantly greater during SV than SAV, and during dynamic and static squatting, SAV produced greater lower limb EMG compared to SV