Comparison of Gait Analysis Between a Triaxial Accelerometer-Based Device and an Optical Motion Capture System

Abstract

AYUMI EYE is an accelerometer-based gait analysis device that measures the 3D accelerations of the human trunk. This study investigated the measurement accuracy of the AYUMI EYE as hardware as well as the accuracy of the gait cycle extraction program via simultaneous measurements using AYUMI EYE, a ground reaction force (GRF), and an optical motion capture system called VICON. The study was conducted with four healthy individuals as participants. The gait data were obtained by simulating four different patterns for three trials each: normal walking, anterior-tilt walking, hemiplegic walking, and shuffling walking. The AYUMI EYE and VICON showed good agreement for both the acceleration and displacement data. The durations of subsequent stride cycles calculated using the AYUMI EYE and GRF were in good agreement based on the calculated cross-correlation coefficients (CCs) with an r value of 0.896 and p-value less than 0.05, and their accuracies for these results were sufficient.

Trajectory of Walking Function in Late-Stage Older Individuals Managed with a Regular Exercise Program: A 5-Year Longitudinal Tracking with an IoT Gait Analysis System Using Accelerometers

“…Gait function was measured using a 3-axis accelerometer (IoT-based gait analysis device, AYUMI EYE [26]; Waseda Elderly Health Association Co., Ltd.).…”

“…Sufficient practice trials were conducted, and the average of the two trials was calculated for each parameter. The 10 MWT is a well-established assessment method that has been validated in numerous previous studies [27], including those using accelerometers [26].…”