Gait assessment
A portable Inertial Measurement Unit (IMU) system (GYENNO Science) during a 5‐m timed TUG test was used to access gait feature. IMUs were placed on the chest, back, wrists, thighs, ankles, and insteps of the subjects via Velcro straps in order. Wirelessly transmitted mobility data were stored and analyzed by a laptop that controlled the protocols. The mean value and variability (coefficient of variation, CV) of gait feature including step length, stride velocity, stride length, arm range of motion (ROM) maximum, double support time, gait cycle, turning average duration, and turning average duration velocity were calculated (CV was calculated as standard deviation/mean × 100%).