Participant Flowchart
PBT indicates perturbation-based balance training.All participants in the PBT group were assigned to four 20-minute PBT sessions, and participants in the control group were assigned to 4 treadmill walking training sessions; the initial 2 training sessions were performed on the same day immediately after the pretraining assessments. A week later, the third training session was completed, whereas the fourth was conducted after 6 months (