**4. Results**

In the present study, CV values were assessed over 102 subjects, equally split into the three populations, involving 29,042 strides in total. Figure 3 shows, for every subject of H-group, mean CV values (+SD) over all the available strides for both GL (panel A) and TA (panel B). In the same way, Figures 4 and 5 depict mean CV values (+SD) over all the available strides for both GL (panel A) and TA (panel B), for every subject of C-group and A-group, respectively. Considering 6519 strides in total (a mean value of 192 ± 71 per h-subject), mean CV values (+SD) of 0.71 ± 0.16 for GL and 0.72 ± 0.14 for TA were achieved over H-group. In a total of 9923 strides (a mean value of 292 ± 38 per c-subject), mean CV values of 0.83 ± 0.19 for GL and 0.77 ± 0.12 for TA were computed over C-group. Eventually, in a total of 12,600 strides (a mean value of 371 ± 151 per a-subject), mean CV values of 1.10 ± 0.21 for GL and 0.85 ± 0.11 for TA were obtained over A-group.

A direct comparison among average CV values over the three populations is reported in Figures 6 and 7 for GL and TA, respectively. A statistically significant reduction (*p* < 0.05) of mean CV is detected for GL in H-group compared to both C-group (15% reduction) and A-group (35% reduction). Moreover, the di fference observed between C-group and A-group is statistically significant (25% reduction, *p* < 0.05, Figure 6). A significant reduction (*p* < 0.05) of mean CV is detected for TA in H-group compared to A-group (15% reduction). The di fference observed between C-group and A-group is statistically significant as well (10% reduction, *p* < 0.05, Figure 7). The 7% reduction of mean CV value detected in H-group compared to C-group is not statistically significant (*p* > 0.05). A direct comparison between mean CV values computed in GL and in TA within the same group was also performed. In A-group, a significant higher mean CV value for GL than for TA was observed (1.10 ± 0.21 vs. and 0.85 ± 0.11, *p* < 0.05). No further significant di fferences were detected.

**Figure 4.** Average CV values (+SD) over all the available strides for GL panel ( **A**) and TA panel (**B**) in every subject of C-group. Horizontal dashed line represents the mean value over the C-group.

**Figure 5.** Average CV values (+SD) over all the available strides for GL panel ( **A**) and TA panel (**B**) in every subject of A-group. Horizontal dashed line represents the mean value over the A-group.

**Figure 6.** Average CV-GL (± SD) values over H-group (red bar), C-group (blue bar) and A-group (cyan bar). Each mean value is significantly di fferent (*p* < 0.05) from the other two mean values.

**Figure 7.** Average CV-TA (± SD) values over H-group (red bar), C-group (blue bar) and A-group (cyan bar). \* means significantly di fferent (*p* < 0.05) from the other two mean values.
