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Inertial sensors placement (A) at the bilateral feet, chest, and lumbar spine and the sample courses for the walk and turn task (B) and walk and turn with obstacle task (C). For both tasks, the length of the course was 7.62 m (25 ft). The obstacle in the walk and turn with obstacle was placed at approximately 3.81 m (12.5 ft) from the starting position and was 0.15 m (0.5 ft) tall.
