Abstract
This paper reports an isokinetic exercise equipment prototype, named the ERIK, for the lower limb that allows a type of single-limb squat exercise with a translational load on the swing leg in the closed kinetic chain style loading on the muscles of the stance leg in the standing position. This training applies loads to the gluteal muscles that are effective for the prevention of the knee valgus moment, a major factor in anterior cruciate ligament injuries. To enhance the quality of the load, an electro-rheological (ER) fluid brake system is implemented in the ERIK. The ER brake can reversibly control its resistive torque with a rapid response. This paper reports a prototype of the equipment and certifies its performance through basic experiments. Nevertheless the high resistance created within the trainee's wide motion area and the provision of isokinetic training by controlling the velocity of the trainee's legs, the ERIK has the advantage of safety.
