Abstract
The purpose of this study is to develop the portable measurement system for running and sprint motions. This system is composed of acceleration, gyro and magnetic sensors for three directions. By using this system, stride length, step frequency and speed are estimated during acceleration and constant speed phases. Through the comparison with the conventional measurement system, it was continued that this system can precisely estimate stride length, step frequency and speed during constant speed phase. In the case of acceleration phase, step frequency and running speed also gave good agreement with the conventional measurement system. Furthermore, the effects of contact pattern and sensor positions are quantitatively discussed.
