Cycling exercise may reduce urinary symptom progression in early Parkinson's disease pilot trial

This exploratory analysis of a pilot randomized controlled trial examined the effects of cycling exercise on autonomic symptoms in 30 patients with early Parkinson's disease. The intervention group performed three 40-60-minute cycling sessions per week for 24 weeks, compared to a control group. The primary outcome was not reported; secondary outcomes included autonomic symptoms assessed using the SCOPA-AUT scale.

Results showed that urinary symptoms increased significantly less in the cycling group compared with controls over 24 weeks. Specifically, the urinary frequency subitem improved significantly in the cycling group. However, no differences were observed between groups for other autonomic domains, such as gastrointestinal, cardiovascular, or thermoregulatory symptoms. Exact effect sizes, absolute numbers, and p-values or confidence intervals for these comparisons were not reported.

Safety and tolerability data, including adverse events and discontinuations, were not reported. Key limitations include its nature as an exploratory analysis of a pilot trial with a very small sample size of 30 patients. The authors note the findings warrant further confirmation in large-scale trials. For clinical practice, this preliminary evidence suggests structured cycling exercise may selectively benefit urinary function in early PD, but its effects on broader autonomic dysfunction and generalizability remain uncertain.