The Autonomous Clinic: Navigating AI, Sensors and the Equity Gap in Modern Physiotherapy

Chronic musculoskeletal pain is the largest single contributor to years lived with disability worldwide, and structured therapeutic exercise remains the intervention most consistently endorsed in clinical guidance despite average treatment effects that are modest and frequently short-lived. Virtual reality has been proposed as a means of changing the experience of exercising while in pain, and the number of randomised trials in this area has grown quickly. The resulting literature is difficult to interpret: pooled effect estimates range from negligible to implausibly large, and the reasons for that divergence have received little systematic attention. This critical narrative review integrates mechanistic, clinical and implementation evidence on virtual reality-assisted therapeutic exercise in adults with chronic musculoskeletal pain, with the specific aim of explaining why the field appears at once encouraging and internally contradictory. Evidence was retrieved from openly accessible bibliographic sources and appraised for design adequacy, comparator quality, outcome measurement and reporting transparency. Interventions grouped under a single label are shown to differ along at least six independent dimensions, including display immersion, movement demand, therapeutic content and supervision, and this heterogeneity propagates directly into synthesis. Five candidate mechanisms are distinguished and evaluated separately: attentional modulation, multisensory and body-representation manipulation, reduction of movement-related fear, exercise dose and exercise-induced hypoalgesia, and expectancy. Effect estimates scale inversely with methodological rigour. Small trials with inert comparators report standardised mean differences that exceed any plausible analgesic effect, whereas the largest sham-controlled trial reports a between-group difference of well under one point on an eleven-point scale, and two independent pragmatic cluster-randomised trials report no benefit. The most defensible conclusion is that virtual reality currently alters the experience of exercising, particularly enjoyment, tolerance and engagement, more reliably than it alters pain. Priority research needs are mechanistically informative designs with formal mediation analysis, comparator standardisation, adequately powered pragmatic trials with meaningful follow-up, and consistent reporting of intervention content.