Relationship between accelerometric signals from body-mounted sensors and center of pressure from a force plate during quiet stance

Natural sway and corrective surface reactive forces during stance are important signs of postural function and can be quantified with force plates. Force plates are typically embedded in the ground and used in a laboratory setting. This type of postural measurement system is ecological since it places minimum constraints on subjects, although its current setup and costs do not currently make this a viable solution for a home environment. New sensor technologies and assemblies, or measurement algorithms, need to be developed before surface forces can be used to measure sway outside a laboratory. The aims of the present study were to determine whether it is feasible to use wearable inertial devices instead of force plate measures to quantify spontaneous body sway. and to validate with a biomechanical model this methods.