Visualization of the Muscle Tension in Stand-Up and Sit-Down Motion Using MoCap and EMG

Abstract

In this study, visualization of the muscle tension of the Vastus lateralis which is the main muscle for standing up and sitting was performed by motion capture and electromyography. It was aimed to confirm the effect of training, with this visualization. First, a human skeletal muscle model was generated from motion capture measurement data based on kinematics theory. Next, the muscle tension model of the Vastus lateralis of the standing and sitting motion was generated from the electromyography data based on the inverse kinetic theory. We used nMotion-Musculous, for estimation of muscle tension. As a result, the muscle tension of the Vastus lateralis was presumed to be 600 to 800 N in both cases of standing up and sitting. Furthermore, a muscle tension of about 100 N was estimated even in a state of maintaining the standing posture. These muscle tension estimates were visualized by CG animation and feed back to the subjects.