Effects of Exergaming and Resistance Training on Reaction time and Intraindividual Variability in Older Adults: a Randomized Clinical Trial

This study aimed to analyze the effects of exergaming and resistance training on reaction time in older adults and to investigate intraindividual variability in reaction time. Thirty-six participants (62.1 ± 7.1 years), randomly assigned to exergaming (n = 17) or resistance training (n = 19) groups, underwent two protocols of physical training carried out three times a week for 13 weeks. The exergaming program was based on games from Kinect Sports and Kinect Adventures collections using a console Xbox 360 Kinect. In the resistance-training program, each session consisted of ten full-body exercises using free weights and weight machines. Outcomes were reaction time in simple (finger-press test) and complex (Stroop test) tasks and intraindividual variability. A mixed model analysis of variance was conducted, and effects sizes were calculated. Interactions effects revealed no significant differences between groups before and after 13 weeks of training. Regarding the main effects, only the exergaming group showed a significant (p = 0.041) and relevant decrease in reaction time in a complex task (neutral test) when compared to the pre- (1854 ± 732 ms) and post-tests (1530 ± 521 ms). The resistance-training group showed a trend (relevant effect size) of improvement in intraindividual variability in reaction time. These results suggest that both interventions could benefit the cognitive function of older adults. Exergaming improves the reaction time in a complex task, and resistance training improves the intraindividual variability. However, exergaming was not superior to resistance training in any of the outcomes. Trial Registration: Brazilian Clinical Trials Registry (RBR-7fh22d/) on 06/07/2019, retrospectively registered.