Walking under an alternating task.
(A) Gait speed; (B) Gait variability; (C) Cadence; (D) Stride length; (E) Stance; (F) Swing; (G) Cycle duration; (H) Double support; (I) Minimum toe clearance.The gait cycle length under SMT increased from T1 to T3 and from T2 to T3. The MTC reduced from T1 to T2 and from T1 to T3 (