Fig. 5

LRA level, characterized by \(\alpha\) exponent, for the three evaluation sessions. Each gray line corresponds to the data from one patient. Squares represent the mean across patients and whiskers indicate standard deviation across patients. The shaded area corresponds to values of healthy walkers obtained by applying AFA on 10 series of 1024 points from [53]. Brackets indicate significant differences between standard deviation. Significance levels: **\(p \le 0.01\), *\(p \le 0.05\)