## 6 Results  
Demographical data of the study population are shown in Table 1. We could not find any statistical difference between the two groups for the parameters of age, BMI, years of dance practice, or age when they started practicing.  
First, we analyzed the healthy subjects. We compared stabilizer parameters of the right and left feet for each parameter and no statistical differences for all parameters were detected (Table 2).  
The pathological group was then analyzed. We compared stabilizer parameters between the injured feet and the healthy feet and no statistically significant differences were observed (Table 3).  
We calculated the differences between open and closed eyes for all the parameters, and with reference to the pathological group, data collected with the feet that suffered a grade II ankle injury were compared with healthy contralateral limbs. As reported in Table 4, no significant differences between the sides were observed.  
Lastly, we also compared right foot parameters of healthy and pathological subjects, both with open eyes (Table 5) and the difference between open and closed eyes (Table 6), and no significant differences were detected.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Post-Injury (N = 11)** & **Healthy (N = 11)** & _p-Values_ \\ \hline Age (years) & 16.36 \(\pm\) 2.81 & 17.5 \(\pm\) 3.37 & \textgreater{}0.05 \\ BMI (Kg/m\({}^{2}\)) & 19.85 \(\pm\) 2.43 & 19.37 \(\pm\) 2.33 & \textgreater{}0.05 \\ Years of Practice & 11.91 \(\pm\) 2.11 & 12.37 \(\pm\) 4.07 & \textgreater{}0.05 \\ Age When They Started & 4.36 \(\pm\) 1.23 & 5.18 \(\pm\) 1.47 & \textgreater{}0.05 \\ Practicing (years) & 20.75 \(\pm\) 6.92 & 18.58 \(\pm\) 5.97 & \textgreater{}0.05 \\ \hline \hline \end{tabular} Data are reported as Mean \(\pm\) SD. Abbreviation: BMI, body mass index.  
\end{table}
Table 1: Demographical data of participants.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Right Foot** & **Left Foot** & _p-Values_ \\ \hline Monopodatic Ellipse Area (mm\({}^{2}\)) & 105.91 \(\pm\) 67.87 & 82.06 \(\pm\) 47.43 & \textgreater{}0.05 \\ Monopodatic CoP Speed (mm/s) & 13.84 \(\pm\) 3.24 & 13.20 \(\pm\) 5.34 & \textgreater{}0.05 \\ Arabesque Ellipse Area (mm\({}^{2}\)) & 274.40 \(\pm\) 255.50 & 152.23 \(\pm\) 87.54 & \textgreater{}0.05 \\ Arabesque CoP Speed (mm/s) & 21.84 \(\pm\) 8.46 & 19.65 \(\pm\) 5.60 & \textgreater{}0.05 \\ Passe Ellipse Area (mm\({}^{2}\)) & 222.49 \(\pm\) 130.06 & 133.26 \(\pm\) 72.00 & \textgreater{}0.05 \\ Passe CoP Speed (mm/s) & 22.22 \(\pm\) 4.98 & 18.17 \(\pm\) 5.58 & \textgreater{}0.05 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Comparison between right and left foot in healthy subjects (N = 11) for stabilizer parameters acquired with open eyes.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & **Trauma** & **No Trauma** & _p-Values_ \\ \hline Monopodatic Ellipse Area (mm\({}^{2}\)) & 128.25 \(\pm\) 93.83 & 83.23 \(\pm\) 49.15 & \textgreater{}0.05 \\ Monopodatic CoP Speed (mm/s) & 14.23 \(\pm\) 5.05 & 13.28 \(\pm\) 5.55 & \textgreater{}0.05 \\ Arabesque Ellipse Area (mm\({}^{2}\)) & 165.17 \(\pm\) 127.18 & 117.16 \(\pm\) 59.89 & \textgreater{}0.05 \\ Arabesque CoP Speed (mm/s) & 19.32 \(\pm\) 4.38 & 18.54 \(\pm\) 5.63 & \textgreater{}0.05 \\ Passe Ellipse Area (mm\({}^{2}\)) & 148.15 \(\pm\) 82.43 & 119.66 \(\pm\) 66.75 & \textgreater{}0.05 \\ Passe CoP Speed (mm/s) & 20.75 \(\pm\) 6.92 & 18.58 \(\pm\) 5.97 & \textgreater{}0.05 \\ \hline \hline \end{tabular} Data are reported as Mean \(\pm\) SD. Abbreviation: CoP, Centre of Pressure.  
\end{table}
Table 3: Comparisons between injured and healthy feet in pathological subjects (N = 11) for stabilizer parameters acquired with open eyes.