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Spectral visualization of abnormal gait (knee OA group, a 50 year-old male). The blue lines show 3D-accelerometer measurements in the anteroposterior direction, and the pink lines show 3D-gyroscope measurements in the mediolateral direction. There are three peaks, two measured by 3D-accelerometry, and one measured with a 3D-gyroscope, indicating abnormal values due to an asymmetric gait pattern.
