Figure 4

Linear envelopes of the sEMG: comparison between walking in DGO and treadmill walking. sEMG mean amplitudes of the four muscles between the different walking conditions within groups. sEMG variability is indicated with ±1SD shades in the background of the average curve. P-values as well as Spearman correlation coefficients (ρ) are displayed in the graphs. Orange = DGO walking; blue = treadmill walking. Differences in amplitudes between the curves are presented with the p-value; correlations with the ρ-coefficients. sEMG = surface electromyography; TA = tibialis anterior; GM = gastrocnemius lateralis; VM = vastus medialis; BF = biceps femoris; DGO = Driven Gait Orthosis.