Abstract
Motions of our body are generated by muscle contractions. Effort to move our body can be estimated by knowing the muscle activity to generate the motion. In this study, we propose a real-time muscular effort visualization system for an upper extremity with a low calculation cost. We picked up representative configurations of the arm, and the muscle activations to maintain the postures were estimated by the OpenSim in advance. The muscle activations at the arm configurations that were not picked up were obtained by a linear interpolation calculation using the estimated muscle activation values of the neighboring representative configurations. The obtained muscle activations were stored in a database, and the visualization system showed the muscular effort of the current arm configuration by searching the database.
