One of the greater issue for the anterior cruciate ligament (ACL) reconstruction is the selection of the graft type to be used (1-2). Several research used electromyographic (EMG) data to evaluate how muscular function is altered after this kind ofsurgery (3). Mechanical response of a muscle data can be combined with muscular activation to evaluate delay between contraction and development of the force/torque of a joint, showing how muscle provide mechanical response and protection during everyday activities. This delay time is known as electromechanical (EMD) (4-6).