Tai Chi combined with the sham tDCS group
The participants in the TCT group participated in a 12-week 24-form Tai Chi program combined with sham tDCS. Tai Chi training was consistent with those in the TCT group. In the sham tDCS condition, the current was initially ramped up to 2 mA over 30 s and immediately ramped down to 0 mA to prevent the actual stimulation of the target region.