Fig. 5
From: Can humans perceive the metabolic benefit provided by augmentative exoskeletons?
The average JND magnitude (solid red) plotted against the state-of-the-art in exoskeleton-driven metabolic rate reductions. The 95% confidence interval for the standard error of the mean of 5.35% is shown (shaded red). As of the date of writing, no published device (to the authors’ knowledge) exists that would cause a perceivable short-term energetic benefit to the average wearer. Data reproduced with permission from [8]