Figure 7
From: Simulation-based biomechanical assessment of unpowered exoskeletons for running
(a) is the correlation between all muscles’ fatigue and two antagonistic mono-articular hip muscles’ fatigue, and (b) is the correlation between metabolic rate and two antagonistic mono-articular hip muscles’ fatigue; the color of each point in this plot is the same with its column color in Fig. 6. The P value for (a, b) are \(P<0.0001\) and \(P=0.0017\), and ”Pearson’s r-value” are \(r=0.91\) and 0.71. Both figures show a certain linear correlation between the parameters. Interestingly, for both figures, near to the optimum spring coefficient, the deviations from the linear estimation are minimum, and by getting away from the optimum stiffness coefficient, the deviations increase.
