Mean values for the dynamic Global Symmetry Index () plotted against running speed.

<p>Mean values for the dynamic Global Symmetry Index () are evaluated starting from the single values of , and and averaged within each group of subjects, ± SD, in untrained runners (UR), occasional runners (OR) and skilled runners (SR). Two-way ANOVA (group×running speed) show that the group of UR had a mean <i>GI</i> always lower compared to the OR and SR, (* = p<0.01), independently from the running speed.