Table 1.

Overview of gait activities for dual-task gait training.

	Predictable	Unpredictable
Stationary	Closed tasks (i) Walking in flat, wide space (ii) Walking over/around obstacles, all of the same height and equally spaced (iii) Walking with narrow BOS	Variable motionless tasks (i) Walking around obstacles with variable spacing (ii) Walking over obstacles of variable height (iii) Walking over changing floor surfaces
Moving	Consistent motion tasks (i) Walk toward/beside/behind a person moving at a consistent speed and direction (ii) Walk under different lighting conditions	Open tasks (i) Walking in a crowded corridor (ii) Walking outdoors in the car park (iii) Walking and negotiating a moving obstacle