Table 4.

Mean, maximum, and minimum RMSE values corresponding to each target variable predicted by the network according to cut-off frequency of the Butterworth Low-pass filter applied to IMU data. The predicted variables are the 3D GRFs, the Flexion/Extension (FE) moment, the Adduction/Abduction (AA) moment, and the Rotation (R) moment at the right knee joint.

	RMSE
	Ground Reaction Forces (N/kg)									Right Knee Moments (N·m/kg)
Cut-Off Frequency	GRFx			GRFy			GRFz			FE			AA			R
	m	max	min	m	max	min	m	max	min	m	max	min	m	max	min	m	max	min
12 Hz	0.0290	0.0381	0.0192	0.0433	0.0606	0.0232	0.0409	0.0587	0.0209	0.1159	0.2161	0.0982	0.0302	0.0465	0.0220	0.0114	0.0196	0.0090
24 Hz	0.0087	0.0107	0.0031	0.0381	0.0644	0.0103	0.0188	0.0389	0.0140	0.0816	0.1171	0.0692	0.0334	0.0593	0.0292	0.0121	0.0498	0.0223
32 Hz	0.0081	0.0102	0.0072	0.0350	0.0460	0.0338	0.0184	0.0198	0.0152	0.0748	0.0776	0.0725	0.0295	0.0348	0.0248	0.0117	0.0130	0.0106