The visualization system of center of pressure and base of support in sit-to-stand movement

A sit-to-stand (STS) movement is important to understand how the balance function of a rehabilitation patient is recovered. For analyzing a STS movement, we propose a system to visualize center of pressure (COP) and base of support (BOS) information while a patient standing from a seated position. Our system consists of (1) load sensors to obtain COP of both standing and seating position and (2) sheet and pressure sensors to obtain BOS of both buttock on the chair and feet on the feet boards. A prototype system has been tested by occupational and physical therapists worked in rehabilitation hospitals and has been used in practical treatment for rehabilitation patients. We report the results of our questionnaire of those experiments.