Experimental design
A randomized controlled clinical trial, with parallel arms and blinding of the evaluator and participants concerning the allocation. A total of 60 participants of both sexes, aged between 60 and 80 years old, were randomly allocated at a 1:1 ratio into an experimental group (EG) or a control group (CG). The participants of the EG underwent a mixed dual-task protocol training in which they performed initially SMT and SDT interchangeably during the first 12 weeks and after they progressed strictly with SDT, in the last 12 weeks of this protocol. The participants of the CG performed only SMT and SDT activities alternately throughout all 24 weeks. Both groups were assessed at allocation (T1), at 24 weeks post-allocation (T2), and after 24 weeks of intervention (T3).The recommendations of the Declaration of the World Medical Association of Helsinki and the Consolidated Standards of Reporting Trials (CONSORT) were met. The study was approved by the Research Ethics Committee of the University of Pernambuco (study# 2.415.658; CAAE: 71192017.0.0000.5207) and registered prospectively with 