The Physiological and Psychological Impact of Nature
Reduces Stress and Lowers Cortisol:
Chronic stress is associated with elevated cortisol levels, which can negatively impact mood, immune function, and overall health. Numerous studies, including research published in Frontiers in Psychology and Environmental Health and Preventive Medicine, show that exposure to natural environments—such as forests, parks, and green spaces—lowers cortisol and heart rate, reducing the body’s stress response. This physiological shift allows individuals to feel calmer and more grounded, laying the groundwork for emotional regulation and healing.
Boosts Serotonin and Improves Mood:
Natural light and gentle physical activity in outdoor settings stimulate the production of serotonin, a neurotransmitter involved in mood regulation. Exposure to daylight, fresh air, and even the colors and sounds of nature have been associated with improvements in mood and reductions in depressive symptoms. A meta-analysis in Nature Scientific Reports found that individuals who spend regular time in nature report higher levels of life satisfaction and psychological well-being.
Activates the Parasympathetic Nervous System:
Being in nature promotes activation of the parasympathetic nervous system—the “rest and digest” mode—balancing the effects of prolonged activation of the sympathetic nervous system, which is responsible for fight-or-flight responses. This shift supports improved digestion, better sleep, and greater feelings of relaxation. Research suggests that even brief interactions with natural environments can trigger this calming response, reducing physiological markers of stress.
Enhances Mindfulness and Cognitive Function:
Nature draws our attention outward, helping individuals disengage from ruminative thinking patterns often associated with anxiety and depression. Time in green spaces has been linked to improved cognitive performance, enhanced working memory, and greater attentional capacity. Findings from the American Psychological Association note that natural settings encourage mindfulness, which can support therapeutic processes by fostering greater emotional awareness and self-reflection.
The Role of Nature Informed Therapy
Nature Informed Therapy (NIT) builds on this body of research by integrating the natural world into therapeutic practice. By engaging in therapy outdoors—whether walking in a forest, sitting near a stream, or simply being present in a natural setting—individuals experience both the relational support of a therapist and the restorative benefits of the environment itself. NIT encourages people to slow down, reconnect with themselves, and deepen their relationship with the natural world as part of their healing process.
While nature alone is not a cure-all, it is a powerful and evidence-based complement to traditional therapeutic approaches. For individuals coping with anxiety, depression, grief, or life transitions, the outdoors offers a space for reflection, nervous system regulation, and emotional processing.
Sources:
https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2025.1522629/full
https://www.jstage.jst.go.jp/article/ehpm/27/0/27_22-00160/_article/-char/ja
