Supplementary Figure S1. Comparison of SampEn of lower-limb continuous joint angle time series in the sagittal, coronal, and transverse planes among the HNRFS, HRFS-AN, and HRFS-GR groups. *p < 0.05; **p < 0.01; ***p < 0.001. SampEn parameters were set to m = 2 and r = 0.1.