Effects of a 12-Week Semi-Immersion Virtual Reality-Based Multicomponent Intervention on the Functional Capacity of Older Adults in Different Age Groups: A Randomized Control Trial

Virtual reality (VR) exercise has been used as a strategy to promote physical health in older adults. Studies have revealed that the effects of exercise interventions vary across age groups. This study aimed to investigate the effects of a 12-week semi-immersion VR-based multicomponent exercise program on the functional fitness of young-old (65–73 years) and middle-old (74–85 years) adults. This study recruited two age groups (young-old adults, n = 49; middle-old adults, n = 37) and randomly assigned them to the experimental (EG) and control (CG) groups. EG participants performed a 75–90-min semi-immersion VR exercise routine twice weekly for 12 weeks, whereas CG participants maintained their original lifestyles without any alterations. The Senior Fitness Test was used to measure functional fitness by assessing upper- and lower-limb flexibility and muscle strength, cardiorespiratory fitness, and balance. EG participants exhibited greater improvements than their CG counterparts in certain functional fitness tests, specifically the Back Scratch, Arm Curl, 2-Minute Step, and 8-Foot Up-and-Go Tests. On comparing the age groups, a difference was exclusively noted in the effects of the Chair Sit-and-Reach Test. In the EG, the intervention significantly improved lower-body flexibility in young-old adults but elicited no such improvement in middle-old adults. Semi-immersion VR exercise improved the functional fitness of young-old and middle-old adults in the EG, with superior results in the former. Elucidating the impact of age-specific exercise interventions on functional capacity will help practitioners design age-specific exercise training content that enhances functional fitness in older adults of different ages.