Effects of Exergame Training on Executive Function and Heart Rate Variability in Middle-Aged and Older Adults: A Randomized Controlled Study

Exergame has become widely popular and offers great levels of cognitive demands, thus may facilitate cognitive benefits. In addition, researchers have proposed that cardiac autonomic function, assessed via heart rate variability (HRV), is associated with cognitive executive function. However, few exergame training studies have investigated this relationship. This study aimed to investigate the effects of 10-week exergame training on executive function and HRV in middle-aged and older adults. Ninety-one participants were randomly assigned to either an exergame training group (63.73 +/- 4.48 years) or a control group (62.46 +/- 4.77 years). The training program was 50 min per session, twice per week for 10 weeks. The control group was instructed to maintain their usual lifestyle. All participants completed questionnaires and received assessments of executive functions and electrocardiography at baseline and postintervention. Results revealed significant group-by-time interaction effects for the three indices of the digit span test and the total initiation time of the Tower of London task with better postintervention performances achieved by the exergame group. The 6 min walk test also improved significantly in the exergame group but not in the control group. No significant change in HRV was observed for both groups. There were significant correlations between HRV and digit span test scores. Our results suggest that the 10-week exergame training program was effective in improving executive functions of working memory, inhibitory control, and planning ability as well as aerobic fitness in middle-aged and older adults. Moreover, HRV was associated with improved executive function.