Resolution:
## Figure 2.
Flowchart of the optimal FRO stiffness selection procedure. After sorting the different stiffness configurations based on peak knee extension
angle in single support (KE-K_{x}), absolute differences in peak KE will be calculated. KE-K_{2} and/or KE-K_{3} will be excluded if this difference is more than five degrees. Otherwise, the remaining
configurations will be sorted by net non-dimensional walking energy cost (NNC-K_{x}) (this can be either two or three remaining configurations). The stiffness that results
in the lowest walking energy cost will be selected as the subjectâ€™s optimal FRO. K_{1,} K_{2} and K_{3} = rigid, stiff, or flexible FRO stiffness configurations; K_{OPT} = subjectâ€™s optimal FRO stiffness; KE = knee extension angle; KE-K_{x} = stiffness sorted by KE; NN_cost_{%SMC} = net non-dimensional walking energy cost relative to speed matched controls; NNC-K_{x} = stiffness sorted by NN_cost_{%SMC}; SS = single support.
Kerkum |