However, for Grp2, Grp3, and Grp4, the variability in the group average normalised stride time was nearly similar to that of step time, which can be possibly attributed to the majority of our elderly healthy participants, i.e., Grp2 and Grp3 (∼63% showing step turn; rest showing spin turn), and individuals with PD, i.e., Grp4 (∼100%), showed step turn [marked by a weight shift from one leg to the other, while changing the direction of walking (Gavriliuc et al., 2019)], while traversing the turn segment of the pathway to ensure greater stability (Taylor et al., 2005) and prevent possible fall. Here, RASGRP3 is linked to Parkinson disease.