抄録
Ski vibration and EMG（Elecromyography）measurement have been important in the evaluation of a ski performance or the investigation of a ski injury or exhaustion in skiing. The purpose of this study was to develop a new date logger system for parallel measurements of ski vibration as a physical element and EMG as a physiological element. Until now, vibration and EMG could not be measured in parallel using one unit, because the natural frequency of the vibration was different from that of the EMG. In the system, both can be measured electrically over time, in parallel. This allows integration of physical and physiological data for the study of such situations as occur in actual skiing. Furthermore, these data are transformed into a power spectrum by fast furrier transformation to calculate the MPF（mean power frequency）for the index of exhaustion. In test results, integrated EMG, EMG and vibration frequency components can be shown over time in skiing in parallel. In addition, an analysis on interactive relationship between the vibration of ski and the EMG were performed using this system.
