# Biomechanical Task-Based Gait Analysis Suggests ReWalk Gait Resembles Crutch Gait
## 4 Discussion
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Subject**} & \multirow{2}{*}{**Natural**} & \multirow{2}{*}{**ReWalk**} & \multirow{2}{*}{**Crutch**} & \multicolumn{1}{c}{**ReWalk-**} & \multicolumn{1}{c}{**Crutch-**} \\  & & & & **Natural** & **Natural** & **ReWalk** \\ \cline{2-7}  & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **Difference** & **Difference** & **Difference** \\  & **(μV)** & **(μV)** & **(μV)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** \\ \hline \hline \#3 & 26.82 \(\pm\) 3.29 & 4.00 \(\pm\) 1.42 & 2.27 \(\pm\) 1.52 & \(-85.09\) *** & \(-91.52\) *** & \(-43.11\) *** \\ \#4 & 29.34 \(\pm\) 7.51 & 5.99 \(\pm\) 4.54 & 13.51 \(\pm\) 8.79 & \(-79.57\) *** & \(-53.94\) *** & 125.40 ** \\ \#5 & 11.51 \(\pm\) 1.80 & 2.84 \(\pm\) 1.43 & 3.95 \(\pm\) 1.17 & \(-75.30\) *** & \(-65.64\) *** & 39.13 ** \\ \#6 & 30.99 \(\pm\) 7.37 & 4.46 \(\pm\) 1.63 & 5.41 \(\pm\) 3.91 & \(-85.60\) *** & \(-82.56\) *** & 21.16 \\ \hline \hline \end{tabular}  
* Statistical significance was assessed by the [PERSON] signed rank test (* \(p<0.001\), *** \(p<0.0001\)).  
\end{table} 
Table 3: _Cont._Even though our results were presented with quantitative data, we do note that our analysis of the time traces is somewhat qualitative and might be susceptible to individual perception. This is in part, due to the inherent difficulties of quantitative assessment of similarity between two graphs. Some studies have proposed employing methods such as LFM and cross-correlation [41; 42; 43], however, precaution is warranted as slight phase shifts in parabolic traces can elicit very low similarity values. This predicament could be alleviated and might even be necessitated, when analyzing data from large populations, by employing artificial intelligence-based pattern recognition techniques. To summarize this study, we have demonstrated that our gait phase analysis method is essential when analyzing gait patterns and assessing biomechanical task-related gait activities that are facilitated by interventions. By comparing the gait patterns elicited by ReWalk with that of natural, crutch-, and AFO gait, future investigations may be able to improve RAGT by shying away from crutches in cases where loading response training is essential and focus on control systems that enable proper promotion of natural gait. We would like to point out that the size of our participant group is of particular concern. The fact that we have only enrolled 6 participants is much too small to reach any definitive conclusions. Moreover, the participants are all healthy males in their late 20s, thus the observations made in this study would in fact be confined to this demographic group. This warrants further studies that include a wider demographic of participants and we currently in preparation of a follow up study with a wider weight, sex, and age group. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app122412574/s1](https://www.mdpi.com/article/10.3390/app122412574/s1)]([https://www.mdpi.com/article/10.3390/app122412574/s1](https://www.mdpi.com/article/10.3390/app122412574/s1)), Figure S1: The EMG and IMU sensor positions; Figure S2. Lower-limb joint angles within the gait cycle obtained during the gait sessions performed by subject 1. Table S1. Shapiro-Wilks test p-values for RF, TA, and SL EMG WL during WA phase. Conceptualization, J.K. and S.-J.K.; methodology, J.K. and Y.K. ; software, J.K. and Y.K. ; validation, J.K., Y.K. and S.-J.K.; formal analysis, J.K.; investigation, Y.K. ; resources, S.-J.K.; data curation, J.K.; writing--original draft preparation, J.K.; writing--review and editing, J.K. and S.-J.K.; visualization, Y.K. ; supervision, S.-J.K.; project administration, S.-J.K.; funding acquisition, S.-J.K. All authors have read and agreed to the published version of the manuscript. This research was supported by the National Research Council of Science and Technology (NST) grant by the Korea government (MSIT) (No.