The unique mechanical aspects of SV and SAV machines can influence different neuromuscular responses. It has reported that; (1) electromyography (EMG) of vastus lateral is and gastrocnemius was higher during SAV than SV; (2) tibialis anterior EMG was significantly greater during SV than SAV, and (3) during dynamic and static squatting, SAV produced greater lower limb EMG compared to SV (Abercromby et al., 2007).