## 3 Results  
Forty participants were initially recruited for the study. After the eligibility criteria screening, six participants were excluded. Five presented visual or vestibular disorders, and one had suffered an acute relapse in the two months prior to study. Finally, 34 participants met all the eligibility criteria (control group, N = 17; intervention group, N = 17). Three patients did not complete the follow-up; thus, the final sample was 31 subjects (control group, N = 16; intervention group, N = 15). The detailed description of the demographic and clinical variables is shown in Table 1.  
In the intervention group, post-intervention improvements were found in the outcomes of the AsBC, 4 SST, 6 SST right foot, 6 SST left foot, and 6 SST mean. On the other hand, in the control group, post-intervention improvements were found in the outcomes of the 4 SST, 6 SST right foot, 6 SST left foot, and 6 SST mean. Neither group had an improvement in static stability, as measured by the FICSIT. The detailed results of the pre-post-intervention comparison within each group is shown in Table 2 and Figure 1.  
Finally, no significant differences were found between groups in the amount of change between pre- and post-intervention assessments (Table 3 and Figure 2). \begin{table}
\begin{tabular}{c c c} \hline
**Demographic and Clinical** & **Intervention Group** & **Control Group** \\
**Variables** & **(N = 16)** & **(N = 15)** \\ \hline \multicolumn{3}{c}{**Sex, N (\%)**} \\ \hline
**Men** & 5 (31.3) & 6 (40) \\
**Women** & 11 (68.8) & 9 (60) \\ \hline
**Age (years)** & 54.44 \(\pm\) 8.66 & 46.47 \(\pm\) 9.65 \\ \hline
**Weight (Kg)** & 66.31 \(\pm\) 8.81 & 68.8 \(\pm\) 18.34 \\ \hline
**Height (m)** & 1.66 \(\pm\) 0.08 & 1.67 \(\pm\) 0.09 \\ \hline
**BMI (Kg/cm\({}^{2}\))** & 24.18 \(\pm\) 3.16 & 24.66 \(\pm\) 5.58 \\ \hline
**Years since diagnosis** & 16.22 \(\pm\) 10.42 & 14.07 \(\pm\) 8.88 \\ \hline \multicolumn{3}{c}{**MS phenotype, N (\%)**} \\ \hline
**R-R** & 5 (31.3) & 4 (26.7) \\
**P1** & 5 (31.3) & 3 (20) \\
**P2** & 6 (37.4) & 8 (53.3) \\ \hline \end{tabular} BMI: body mass index; MS: multiple sclerosis; R-R: relapsing-remitting; P1: primary progressive; P2: secondary progressive.  
\end{table} 
Table 1: Demographic and clinical characteristics of participants at baseline (N = 31). \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Outcome Variables**} & \multicolumn{2}{c}{**Total (N = 31)**} & \multicolumn{2}{c}{**Intervention Group (N = 16)**} & \multicolumn{2}{c}{**Control Group (N = 15)**} \\  & \multicolumn{2}{c}{**Mean \(\pm\) SD**} & \multicolumn{2}{c}{**Mean \(\pm\) SD**} & \multicolumn{2}{c}{**Mean \(\pm\) SD**} \\
**Variables** & **Pre** & **Post** & **Pre** & **Post** & **Pre** & **Post** \\ \hline AsBC Scale (\%) & 64.78 \(\pm\) 16.62 & 66.38 \(\pm\) 15.37 & 63.39 \(\pm\) 13.95 & 69.45 \(\pm\) 12.69 & 66.25 \(\pm\) 19.47 & 63.11 \(\pm\) 17.65 \\
4 SST (seconds) & 13.65 \(\pm\) 3.91 & 12.52 \(\pm\) 4.51 & 13.81 \(\pm\) 3.9 & 12.63 \(\pm\) 4.67 & 13.47 \(\pm\) 4.05 & 12.4 \(\pm\) 4.49 \\ FICSIT (score) & 12.58 \(\pm\) 2.31 & 12.55 \(\pm\) 2.77 & 12.81 \(\pm\) 2.2 & 12.63 \(\pm\) 2.96 & 12.33 \(\pm\) 2.47 & 12.47 \(\pm\) 2.64 \\
6 SST (right foot) & 15.74 \(\pm\) 9.09 & 13.26 \(\pm\) 7.22 & 16.63 \(\pm\) 11.72 & 13 \(\pm\) 6.64 & 14.8 \(\pm\) 5.29 & 13.53 \(\pm\) 8.02 \\
6 SST (left foot) & 15.19 \(\pm\) 8.32 & 12.95 \(\pm\) 5.93 & 15.75 \(\pm\) 10.64 & 12.88 \(\pm\) 5.8 & 14.6 \(\pm\) 5.14 & 13.03 \(\pm\) 6.27 \\
6 SST (mean) & 15.47 \(\pm\) 8.66 & 13.03 \(\pm\) 6.54 & 16.19 \(\pm\) 11.15 & 12.84 \(\pm\) 6.21 & 14.7 \(\pm\) 5.15 & 13.23 \(\pm\) 7.09 \\ \hline \hline \end{tabular}  
* Pre-intervention; Post: post-intervention; SD: standard deviation; AsBC: Activities-specific Balance Confidence; 4 SST: Four Square Step Test; FICSIT: Frailty and Injuries Cooperative Studies of Intervention Techniques; 6 SST: Six Spot Step Test.  
\end{table} 
Table 2: Mean of the scores obtained in the pre–post-intervention of each scale and within each group (paired \(t\)-test).