Walking under a simultaneous dual task.
(A) Gait speed; (B) Gait variability; (C) Cadence; (D) Stride length; (E) Support phase; (F) Balance phase; (G) Cycle duration; (H) Double support; (I) Minimum toe clearance.The swing phase duration under AT increased from T1 to T3 and from T2 to T3 (