“…Three-dimensional (3D) ground reaction force (GRF) composed by three components, i.e., anterior-posterior (F AP ), medial-lateral (F ML ) and vertical (F V ), as well as frictional torque (T F ) are often used in the lower limb joint moments and powers calculation [1] and is a significant indicator in clinical evaluations [2][3][4]. 3D GRF is generally measured by force-plate, which is often limited to a single stance during gait.…”