Table 1. Perturbed standing (data from [26]).

RMSE and R² values of the reconstruction of the ankle joint moment and calf muscle activity in perturbed standing with COM feedback or ankle joint kinematics feedback. Joint moments are reported pooled over all subjects (Pooled) and for individual subjects (Subj.) with the standard deviation over subjects (std). P-values are reported of the paired ttest that compares the model with COM feedback and the model with ankle joint kinematics feedback. The results for muscle activity are only reported for individuals and not pooled over all subjects due to the limitations related to normalizing electromyography data.

	COM feedback		Joint feedback		p:R2	p:RMS
	R2 ± (std)	RMS ± (std)	R2 ± (std)	RMS ± (std)
Ankle moment (Pooled)	0.94	0.008	0.21	0.028
Ankle moment (Subj.)	0.92 (0.07)	0.008 (0.002)	0.31 (0.15)	0.027 (0.007)	< 0.001	< 0.001
Gastrocnemius	0.62 (0.38)	0.004 (0.004)	0.55 (0.33)	0.008 (0.005)	0.12	0.11
Soleus	0.82 (0.18)	0.011 (0.011)	0.58 (0.28)	0.018 (0.015)	0.01	0.02
Tibialis anterior	0.89 (0.14)	0.039 (0.031)	0.58 (0.25)	0.13 (0.11)	0.08	0.12