A Wearable Measurement System for Sole Pressure to Calculate Center of Pressure in Sports Activity

Sole pressure has been analyzed and reported in recent years in medical and sports fields. However, these studies used a force plate or wired pressure sensor systems which has to be limited to a measurement area. Therefore, it cannot be applied to general sports motion like a marathon. This study set a goal to develop a wearable measurement system for sole pressure to calculate center of pressure (COP) in sports activity. To avoid influence of sports performance, the system should be compact and lightweight. The proposed system is 28.5 g and rigidly hold on shoes. The proposed system was applied to one healthy person. Turning motions in normal step and cross step were measured. The analyzed COP shows the difference of steps. Therefore, this system could be used in real sports motion. A future work is to examine the accuracy and repeatability of the sensors.