Effectiveness of Virtual Reality-Based Rehabilitation on Balance, Gait, and Functional Independence in Patients With Parkinson's Disease: Implications for Healthy Longevity.

BACKGROUND AND OBJECTIVE: Parkinson's disease is a progressive neurodegenerative disorder associated with balance impairment, gait dysfunction, falls, disability, and progressive loss of functional independence. Healthy longevity emphasises the preservation of functional ability and well-being rather than survival alone. Virtual reality-based rehabilitation provides an interactive, technology-assisted approach to balance and gait training, but comparative evidence addressing multiple functional domains simultaneously remains limited. This study aims to compare the effectiveness of virtual reality-based rehabilitation with conventional physiotherapy on balance, functional mobility, gait parameters, fall-risk reclassification, adherence, and satisfaction in adults with idiopathic Parkinson's disease, and to interpret these findings within a healthy-longevity and functional-independence framework.

METHODS: This retrospective, multiclinic comparative cohort study reviewed clinical records of 250 adults aged 50 to 60 years with idiopathic Parkinson's disease and Hoehn and Yahr stage II-III. Participants comprised 125 individuals who received an eight-week virtual reality-based rehabilitation programme and 125 who received conventional physiotherapy. Balance was assessed using the Berg Balance Scale (BBS), functional mobility using the Timed Up and Go (TUG) test, and gait performance using gait speed, stride length, and cadence. Fall-risk categories, treatment adherence, and participant satisfaction were also evaluated. Within-group changes were assessed using paired-samples t-tests, while between-group differences in change scores were assessed using independent-samples t-tests with Cohen's d as the effect-size measure. Categorical fall-risk changes were assessed using chi-square tests.

RESULTS: Groups were comparable at baseline for age, sex, Hoehn and Yahr stage, disease duration, comorbidity, BBS, TUG, gait speed, and stride length. Baseline cadence differed significantly between groups. Virtual reality-based rehabilitation produced significantly greater improvements than conventional physiotherapy in BBS score (+8.97 ± 1.27 vs +4.52 ± 1.10 points; d=3.75), TUG performance (-3.51 ± 0.54 vs -1.79 ± 0.47 seconds; d=-3.42), gait speed (+0.234 ± 0.031 vs +0.111 ± 0.029 m/s; d=4.10), stride length (+0.141 ± 0.018 vs +0.081 ± 0.020 m; d=3.18), and cadence (+8.17 ± 1.01 vs +4.17 ± 0.89 steps/min; d=4.21; all p<0.001). A lower fall-risk category was achieved by 108 of 125 participants (86.4%) in the virtual reality group compared with 34 of 125 (27.2%) in the conventional physiotherapy group (χ²=86.87, p<0.001). Adherence and satisfaction were also higher in the virtual reality group (94.7 ± 3.1% vs 88.3 ± 3.0%, d=2.14; and 9.03 ± 0.64 vs 7.15 ± 0.53, d=3.18; both p<0.001).

CONCLUSIONS: Virtual reality-based rehabilitation was associated with substantially greater short-term improvements in balance, functional mobility, gait, and fall-risk classification than conventional physiotherapy. The findings support virtual reality-based rehabilitation as a potentially scalable strategy for preserving mobility and functional independence in people with Parkinson's disease. Because the study did not evaluate survival or long-term disability, the healthy-longevity implications should be regarded as a healthspan-orientated hypothesis requiring prospective longitudinal evaluation.