How Outdoor and Indoor Ecotherapy Support Health Outcomes
Modern medicine is rediscovering something physicians have long known: nature can be a health intervention.
A growing body of research confirms that regular exposure to natural environments supports both physical and mental health outcomes. For healthcare professionals managing chronic disease, stress-related conditions, and workforce burnout, this evidence is increasingly relevant.
A 2023 population-based analysis published in The Lancet Planetary Health found that consistent exposure to green space is associated with lower anxiety and depression, reduced cardiovascular disease risk, and lower all-cause mortality. These findings align with guidance from the World Health Organization, which recognizes access to safe outdoor environments as a key social determinant of health—particularly for mental health, cardiovascular outcomes, and chronic disease prevention. A 2022 systematic review published in Environmental Research reported that regular outdoor walking and forest-based activities were associated with reductions in salivary cortisol, systolic blood pressure, and diastolic blood pressure, especially among adults managing chronic conditions.
This evidence echoes long-standing clinical wisdom. As Dr. Todd Sack wrote in an earlier My Green Doctor ecotherapy article, “Even mild exercise such as daily walking is a potent treatment for anxiety, depression, hypertension, diabetes, obesity, and some arthritis.”
The Clinical Value of Prescribing Time Outdoors
Prescribing time outdoors may appear deceptively simple, yet it directly addresses multiple drivers of chronic disease. Outdoor walking combines physical activity, stress reduction, circadian rhythm regulation, and social engagement. There is no need for difficult structured exercise programs.
Research on “green exercise” and practices such as forest bathing (the Japanese custom of Shinrin-yoku) suggests that outdoor environments amplify the physiological benefits of movement. Patients engaging in regular outdoor activity demonstrate improved mood, lower stress hormone levels, and improved blood pressure control compared with indoor activity alone. Importantly, adherence tends to be higher when activity is framed as accessible, restorative, and enjoyable.
For patients overwhelmed by complex lifestyle recommendations, “time outdoors” offers a clear, achievable entry point into preventive care.
Extending Nature-Based Care Comes Indoors
Nature-based care does not stop at the park gate. A growing body of research shows that healing value of indoor exposure to nature. This includes medical buildings and home with indoor plants, natural daylight, artwook featuring nature, and calming soundscapes. A 2022 study published in Frontiers in Psychology found that patients exposed to natural imagery in healthcare environments experienced lower anxiety levels and improved emotional regulation, particularly in high-stress clinical settings.
The benefits extend to healthcare teams as well. A 2023 review indexed in the U.S. National Library of Medicine reported that nature-informed clinical and office environments are associated with reduced burnout, improved focus, and better stress recovery among staff. These findings are especially relevant as healthcare organizations face unprecedented workforce strain.
Dr. Sack anticipated this connection years ago, writing,“Putting Mother Nature back into our lives can lead to an enhanced sense of relaxation and well-being, and perhaps to lower levels of stress hormones.”
Closing the Gap Between Evidence and Practice
Despite strong evidence supporting both outdoor and indoor ecotherapy, these strategies are not consistently integrated into outpatient care. Patients are stressed. Clinicians are burning out. Practices face time constraints, cost pressures, and increasing expectations around environmental responsibility.
This gap between evidence and implementation is where progress often stalls.
My Green Doctor works with healthcare practices to translate research into practical, low-cost actions that fit real-world clinical workflows. Through its consulting and coaching model, MGD helps practices normalize nature-based strategies by:
- Integrating outdoor activity guidance into patient education and EMR templates
- Encouraging optional walking or park-based activities for staff
- Improving indoor environments with plants, daylight, and calming design elements
- Aligning sustainability efforts with staff well-being and patient experience
Prescribing time outdoors may be simple. Creating systems that support, reinforce, and normalize nature-based care—both outside and inside clinical spaces—is where real impact begins. Nature-informed strategies are no longer “nice to have.” They are part of delivering resilient, human-centered, preventive care.
