Fig. 3From: Learning to walk with an adaptive gain proportional myoelectric controller for a robotic ankle exoskeletonMetabolic Power Reductions. The top axis shows the mean net metabolic power required by eight subjects to walk in the exoskeleton across the three training sessions. All net metabolic power values are normalized by subject mass. The bottom axis represents the powered conditions of this same data as a mean percent change in net metabolic power. Error bars represent ± 1 s.e.mBack to article page