Fig. 4

Average A mean and B peak propulsive phase medial gastrocnemius activation relative to baseline activity for the two audiovisual biofeedback systems, and C representative medial gastrocnemius activation curves (average of 20 gait cycles) across the three walking conditions: baseline (blue), plantar pressure-based biofeedback (orange), and EMG-based biofeedback (yellow); Error bars represent standard error of the mean, brackets indicate pairwise comparisons between plantar pressure-based and EMG-based systems, upward arrows represent pairwise comparisons between baseline walking and the respective audiovisual biofeedback system; *p < 0.05