Figure 5

Sample obstacle course for user trials. Each grid square represents a 1 m × 1 m zone. All obstacles, except the 180° turn (no walls), were built using 5 cm thick and 1.2 m high foam walls. For the stopping block the participant had to stop within 0.5 m of the obstacle before it was removed from their path. The ideal path for the participant is marked by the dotted line. Participants performed a 180° turn at the turnaround location to re-enter the course and manoeuvre back to the start.