## 3 Results
### Standing Balance  
Table 2 shows parameter values and the \(p\)-values (color-coded) for eyes-open and eyes-closed wide stance test conditions for all the CoP parameters compared across test configurations. There were a total of 14 significant parameters for eyes-open and eyes-closed wide stance data. The [PERSON] test supports the findings of the Wilcoxon test with \(p\)-values for eyes-open wide stance: RMS ML and MAXD ML (\(p<0.05\)); MDIST, TOTEX, MVELO (\(p<0.01\)); MFREQ (\(p<0.001\)). Figure 5A shows the ML and AP displacement CoP parameters for eyes-open and eyes-closed wide stance data for the combined CBRE and NASA data. Figure 5B shows combined (ML and AP) CoP displacement parameters, and Figure 5C shows combined velocity and frequency CoP parameters. In the dataset for eyes-open and eyes-closed wide stance data, Table 2, a majority of the significant differences come from comparing unsuited vs. HUT and xEMU Vest vs. HUT. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Config.** & **RMS ML** & **RMS** & **MAXD ML** & **MAXD AP** & **MDIST** & **RDIST** & **TOTEX** & **MVELO** & **MFREQ** \\ \multirow{2}{*}{**Comparison**} & **COP** & **AP COP** & **COP** & **COP** & **COP** & & & \\ \hline \hline \multicolumn{8}{c}{Eyes-Open Wide Stance} \\ \cline{2-9} Unsuited xEMU & 0.154 & 0.361 & 0.774 & 1.512 & 0.342 & 0.204 & 22.543 & 2.254 & 2.086 \\ \multirow{2}{*}{Unsuited xEMU} & 0.228 & 0.445 & 1.124 & 1.836 & 0.44 & 0.26 & 20.784 & 2.078 & 1.698 \\ \hline Unsuited & 0.154 & 0.361 & 0.774 & 1.512 & 0.342 & 0.204 & 22.543 & 2.254 & 2.086 \\ \multirow{2}{*}{HUT} & 0.126 & 0.394 & 0.676 & 1.732 & 0.353 & 0.22 & 29.879 & 2.988 & 4.559 \\ \hline xEMU & 0.228 & 0.445 & 1.124 & 1.836 & 0.44 & 0.26 & 20.784 & 2.078 & 1.698 \\ \multirow{2}{*}{HUT} & 0.126 & 0.394 & 0.676 & 1.732 & 0.353 & 0.22 & 29.879 & 2.988 & 4.559 \\ \hline \hline \multicolumn{8}{c}{Eyes-Closed Wide Stance} \\ \cline{2-9} Unsuited & 0.199 & 0.407 & 0.967 & 1.849 & 0.393 & 0.243 & 23.738 & 2.374 & 1.754 \\ \multirow{2}{*}{xEMU} & 0.226 & 0.519 & 1.087 & 2.192 & 0.495 & 0.307 & 21.372 & 2.137 & 1.481 \\ \hline Unsuited & 0.199 & 0.407 & 0.967 & 1.849 & 0.393 & 0.243 & 23.738 & 2.374 & 1.754 \\ \multirow{2}{*}{HUT} & 0.186 & 0.468 & 0.736 & 2.341 & 0.423 & 0.29 & 31.205 & 3.12 & 3.315 \\ \multirow{2}{*}{xEMU} & 0.226 & 0.5195 & 1.087 & 2.192 & 0.495 & 0.307 & 21.372 & 2.137 & 1.481 \\ \multirow{2}{*}{HUT} & 0.186 & 0.468 & 0.736 & 2.341 & 0.423 & 0.29 & 31.205 & 3.12 & 3.315 \\ \hline \multicolumn{8}{c}{CBEE Eyes-Closed Tandem Stance} \\ \cline{2-9} Unsuited & 0.899 & 0.812 & 4.359 & 5.12 & 1.012 & 0.676 & 270.236 & 27.0236 & 4.433 \\ \multirow{2}{*}{xEMU} & 1.014 & 0.822 & 4.852 & 4.758 & 1.095 & 0.723 & 67.468 & 6.747 & 1.171 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: CoP parameters values across test conditions (eyes-open wide stance and eyes-closed wide stance) and CBRE eyes-closed tandem stance for the test configurations comparisons (unsuited vs. xEMU, unsuited vs. HUT, xEMU vs. HUT). The top value is for the first listed configuration; the bottom value is for the second listed configuration. They are color-coded to represent the degree of significance (see Table Key). Figure 5: Results for unsuited (open circles), xEMU Vest (filled squares), and HUT (filled triangles) test configurations for eyes-open and eyes-closed/wide stance test conditions; error bars represent standard error of mean (SEM) for pooled CBRE and NASA data: (**A**) ML and AP displacement CoP Parameters: RMS ML and AP CoP and MAXD ML and AP CoP; (**B**) Combined (ML and AP) CoP displacement parameters: MDIST, RDIST, and TOTEX; (**C**) Combined velocity and frequency CoP parameters: MVELO and MFREQ. Significant differences are shown with the star icons. In Figure 5A, the CoP displacement measures for eyes-open RMS ML, significant differences were observed between the unsuited vs. xEMU Vest (\(p\) = 0.013) and the xEMU Vest vs. the HUT (\(p\) = 0.023).