as independently 156 designed, optimized, and cross-validated for each extracted gait parameter. The linear model was 157 given by: 158 N 159 y(t)=a+EEkr 1„(t-k)+e(t) k-C 160 161 where y(t)is the gait parameter measured (x,y,z,0,01dOtime series representing the linear 162 and angular kinematics,