“…To assess the reliability of the armband sensor data, features such as absolute acceleration, absolute angular velocity, and mean absolute value of EMGsum (sum of EMG values) were calculated from raw data [ 36 ]. These sensor features are widely used in activity/gesture/motion recognition applications [ 33 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. The acceleration along x, y, and z axes were used to compute the absolute acceleration or magnitude of the acceleration vector (Acc) at any given timestamp (t) using Equation (1) [ 31 , 43 , 44 ].…”