The impact of forest therapy on functional recovery after acute ischemic stroke

Abstract

Stroke is a leading cause of disability worldwide, with a growing need for effective rehabilitation strategies. Forest therapy, involving structured activities in natural environments, has shown significant beneficial effects in various health-related outcomes but no studies have assessed its direct effect on functional recovery after acute ischemic stroke. We assessed whether forest therapy is effective in recovering functional outcome of acute ischemic stroke compared to conventional rehabilitation therapy. This prospective cohort study included patients with acute ischemic stroke admitted within 24 hours of symptom onset. Participants were randomized into forest therapy (n=15) and control (n=27) groups. The forest therapy group underwent five sessions of guided activities in a national forest center, while the control group received standard outpatient rehabilitation. Primary outcome was changes in the modified Rankin Scale (mRS) scores, with secondary outcomes including grip strength, body composition, and psychological well-being assessed using the Worker's Stress Response Inventory and the Positive and Negative Affect Schedule from the time of hospital discharge to 3 months after stroke onset. Change of mRS were analyzed using the generalized estimating equation to compare changes over time between the two groups. At three-month follow-up, the forest therapy group demonstrated a significant improvement in mRS scores compared to the control group (p=0.034). Although no significant differences were found in grip strength or body composition, reductions in somatization and job-related stress were observed in the forest therapy group. No significant changes in positive or negative affect were detected. Forest therapy can contribute to functional recovery and reduce stress-related indicators in acute ischemic stroke patients. These findings support that the integration of forest therapy into stroke rehabilitation protocols to address both physical and psychological aspects of recovery, highlighting the potential for multidisciplinary approaches in post-stroke care.