We are contacting a joint examination of a gait evaluation system between Japan and the USA. This evaluation system can be widely used in anthropometry and consists of an EMG amplifier, and an accelerometer. A 3-axis acceleration data and EMG data are transmitted to a PC via Bluetooth communication. This enables an analysis gait pattern, such as walking cycle factors to be calculated from the acceleration wave form and muscle action potential. This research examined the reliability and the reproducibility in the following factors, the acceleration root mean square value, muscle action potential integral value and the gait time parameter. The result showed high reliability (Intra-class correlation coefficient ICC=0.652〜0.846 P<0.01), reproducibility (ICC=0.511〜0.958 P<0.01) validity (Friedman's test P<0.01). This system has a variety of advantages. Such as the wireless nature is low in physical constraints, also it is possible to combine with other measurement sensors. Additionally, a sampling frequency of 1kHz can be recorded in the current wireless communication measurement, which is useful for FFT calculations.
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