Many people notice they feel calmer at the beach or clearer after a walk in the park. What’s less well known is that these effects are not just subjective, they are measurable, durable, and supported by decades of research.
Here is what the research shows in practical terms.
Living Near Trees May Protect Mental Health
A large Australian study of more than 46,000 adults found that people living in neighborhoods with more tree canopy had significantly lower rates of psychological distress over time. Interestingly, it was not just open grass. Actual tree coverage was associated with better mental health outcomes.¹
Another study found that people living in areas with higher amounts of green and blue space, such as parks and water, had a lower risk of developing depression or anxiety over several years.²
The environment around your home plays a meaningful role in emotional well being.
Improving Green Spaces Improves Mood
In a Philadelphia study, researchers cleaned and greened vacant city lots by planting grass and trees and maintaining them. Residents living near those improved lots reported 41 percent fewer feelings of depression and 50 percent fewer feelings of worthlessness.³
In lower income neighborhoods, the improvements were even greater.
This research suggests that improving physical surroundings can directly improve mental health of those in communities.
Nature Changes the Brain
In one study, participants took a 60 minute walk either in a forest or along a busy city street. Brain scans showed that those who walked in nature had reduced activity in the amygdala, a brain area involved in stress and fear.⁴
Nature does not just feel calming. It measurably affects stress centers in the brain.
Nature Walks Help People With Depression
In people diagnosed with major depressive disorder, a 60 minute walk in nature led to lower negative mood compared to walking in an urban setting.⁵
Another study found that individuals with depression experienced improved mood and better working memory after walking in nature.⁶
Even a single outdoor session can make a difference.
Water May Be Especially Calming
Research shows that living near or spending time around water, such as oceans, lakes, and rivers, is associated with lower psychological distress in some populations.²
Many people intuitively describe water as soothing. The rhythmic sound and open space may help regulate the nervous system.
Nature Based Travel as a Mental Health Reset
Travel, particularly to natural environments, can break routine stress patterns and increase positive emotion. Studies of outdoor physical activity show that exercising in nature improves mood more than exercising indoors.⁷
Even short trips can help. The brain responds positively to novelty, sunlight, movement, and open space.
Travel does not have to be expensive or elaborate. A day at a state park, beach, or hiking trail can provide meaningful psychological benefit.
How Much Nature Is Enough
Research shows benefits from 60 minute nature walks, weekly outdoor time, and living in neighborhoods with meaningful tree coverage.¹⁴
Other population studies suggest that about two hours per week in nature is associated with better overall health and well being.
Consistency matters more than intensity.
Why Nature Works
Nature appears to support mental health by lowering stress hormones, calming the nervous system, reducing overthinking, improving sleep through natural light exposure, encouraging movement, and supporting social connection.
The American Psychiatric Association Lifestyle Psychiatry group includes time in nature as part of a healthy mental wellness plan.⁸
Final Thoughts
In a world that constantly stimulates the nervous system, nature remains one of the most reliable ways to help it recover.
If mood symptoms have been building, consider intentionally scheduling time outdoors. Stay longer than you normally would. Allow your nervous system to settle.
Sometimes improvement begins with something simple and accessible.
Resources
- American Psychiatric Association. Lifestyle Psychiatry Position Statement and Resources. 2023.
- Astell Burt T, Feng X. Association of urban green space with mental health and general health among adults in Australia. JAMA Network Open. 2019.
- Feng X, Astell Burt T. Residential green and blue space and incident depression and anxiety. Environmental Research. 2022.
- South EC, Hohl BC, Kondo MC, MacDonald JM, Branas CC. Effect of greening vacant land on mental health of community dwelling adults. JAMA Network Open. 2018.
- Bratman GN et al. Nature experience reduces rumination and subgenual prefrontal cortex activation. Proceedings of the National Academy of Sciences. 2015.
- Berman MG et al. Interacting with nature improves cognition and affect for individuals with depression. Journal of Affective Disorders. 2012.
- McEwan K et al. A one hour walk in nature reduces amygdala activity and stress compared to urban walking. Molecular Psychiatry. 2021.
- Barton J, Pretty J. What is the best dose of nature and green exercise for improving mental health. Environmental Science and Technology. 2010.
