Effects of Perturbation-based Balance Training on Postural Control and Cortical Modulation in Elderly With Fall Risk

This is a single-blinded randomized controlled trial with pre- and post- measurements. Forty community-dwelling elderly (age\> 65 y/o) with fall risk (defined as functional reach test≦25.4 cm) will be recruited and randomly assigned to experimental group or control group (n=20 for each group). Participants in the experimental group will receive the balance training under perturbation on Balance SystemTM SD, including limits of stability training, maze control training, random control training. The intervention is 40 min/session, 3 sessions/week for 6 weeks. Participants in the control group will remain their regular activity without additional training. The primary outcomes include the limit of stability (LOS) of posture control by Balance Master® and brain modulation by Event-Related Desynchronization (ERD) collected by electroencephalogram (EEG). Secondary outcomes include the sensory organization test (SOT), Berg balance scale (BBS), and falls efficacy scale International (FES-I).