Updated: Jan 14
At Gee Gym we have one of the best and safe equipment by "Techno Gym". Here is how you can minimize the knee shear joint load in Techno Gym leg-extension equipment.
According to Biscarini A. Techno Gym developed an analytical biomechanical model for leg-extension equipment and the associated knee-extension/flexion exercises. The shear component of the tibiofemoral joint load was calculated taking into account all the fundamental elements of the equipment mechanics (resistance pad placement, cam/pulley system geometry, selected weight stack, etc.) and the instantaneous values of the relevant kinematical parameters (knee-flexion angle (theta(f)), angular velocity, and angular acceleration). The optimal distance between the knee-flexion/extension axis and the resistance pad placement point was derived by minimizing joint load. It is nearly independent of joint angular velocity and, for appreciably high resistance torques, becomes nearly independent of resistance level and cam/pulley geometry. This work establishes the rational basis for the design and clinical use of a leg-extension equipment that minimizes pressure on the knee.