Intervention
Participants in each group (EG and CG) attended at least 75% of the training sessions, twice a week, 60 min each, for 24 weeks, which included: (i) a warm-up phase (10 min) with supervised walking on a flat surface, stretching exercises, and joint mobilization; (ii) gait and balance training (four stations, 10 min each, a total of 40 min); and (iii) a relaxation phase, including breathing exercises and global muscle stretching (10 min) (Participants of the CG performed a training protocol consisting of alternating between SDT and SMT every 10 min in stages 1 (the first 12 weeks) and 2 (the last 12 weeks) of the training. This interchanging of the tasks was named in this study as alternating tasks protocol. In the SDT component, participants were asked to simultaneously perform motor tasks—such as walking on stable and unstable surfaces, in a straight line, zigzagging, kicking a ball, going over obstacles, and contouring traffic cones—, and cognitive tasks—such as performing mathematical operations, remembering a list of names, and spelling words. At the beginning of the protocol, participants were instructed to walk at their usual gait speed, in a straight line, on a stable surface. With the evolution of the protocol, the participants were asked to increase their gait speed, walk on unstable surfaces (mattresses), on ropes arranged on the floor in a zigzag way, walk and kick a ball, go over obstacles, go around traffic cones, 