Fig. 2From: Effects of overground gait training assisted by a wearable exoskeleton in patients with Parkinson’s diseaseFrom top to bottom: series of stride durations of a healthy 62-year-old subject freely walking overground during a pilot test, and patient #8 in T0, T1 and T2. The gray dashed lines indicate the mean stride durations, and \(\alpha\) is the fractal exponentBack to article page