There’s something quietly powerful about stepping into a forest. The way light filters through the canopy, the soft crunch of leaves underfoot, the earthy scent of moss and damp soil — it’s the kind of experience that seems to slow time down. What many people don’t realise is that this isn’t just pleasant. It’s therapeutic in a very real, measurable sense. The Japanese practice of shinrin-yoku, or forest bathing, has been studied extensively over the past few decades, and the findings paint a compelling picture of just how deeply nature immersion can affect our mental wellbeing.
This article explores what forest bathing actually is, what the science says about its psychological benefits, and how you can weave it into your own life — even if you don’t live near a vast woodland.
What Is Forest Bathing?
Forest bathing doesn’t involve water, a swimsuit, or anything remotely athletic. The term shinrin-yoku was coined by the Japanese Ministry of Agriculture, Forestry and Fisheries in 1982, and it translates quite literally as “taking in the forest atmosphere” or “forest bathing.” The idea is simple: you immerse yourself in a natural, wooded environment and engage with it through all your senses — slowly, deliberately, and without an agenda.
This is not hiking. It’s not birdwatching. It’s not exercise in the conventional sense. Forest bathing is about presence. You’re not trying to reach a destination or complete a route. You’re simply being in nature, allowing your nervous system to respond to the environment around you.
Where Did It Come From?
Japan took the concept seriously from the start, incorporating shinrin-yoku into national health programmes and eventually establishing 62 designated “Forest Therapy Trails” across the country. Researchers like Dr Qing Li, an immunologist at Nippon Medical School in Tokyo, spent years studying the physiological and psychological effects of time spent in forests — and what they discovered sparked global interest.
South Korea followed suit, developing its own forest therapy infrastructure, including dedicated healing forests and certified forest healing instructors. Today, the practice has spread widely, with wellness researchers, therapists, and health organisations around the world recognising its potential.
The Mental Health Benefits of Forest Bathing
This is where things get genuinely fascinating. The mental health benefits of forest bathing aren’t simply anecdotal — they’re backed by a growing body of peer-reviewed research. Let’s look at what the science actually shows.
Reduced Stress and Anxiety
One of the most consistently documented effects of forest bathing is a significant reduction in stress. Studies have shown that spending time in forested environments lowers levels of cortisol — the body’s primary stress hormone — compared to time spent in urban settings. A 2019 review published in Environmental Health and Preventive Medicine found that forest environments were associated with lower cortisol concentrations, reduced pulse rate, and lower blood pressure.
Anxiety responds similarly. The gentle, non-threatening stimulation of a forest environment — soft sounds, muted colours, natural patterns — appears to calm the amygdala, the part of the brain associated with fear and stress responses. For people who carry chronic anxiety, regular time in nature can act as a genuine counterbalance to the overstimulation of modern life.
Improved Mood and Reduced Depression
Forest bathing has also been linked to improvements in mood and a reduction in depressive symptoms. Research conducted in Japan found that participants who walked through forest environments reported significantly lower scores on measures of depression, tension, anger, fatigue, and confusion compared to those who walked through urban environments.
A study published in Proceedings of the National Academy of Sciences in 2015 found that participants who walked in a natural environment for 90 minutes showed reduced neural activity in the subgenual prefrontal cortex — a brain region associated with rumination and depressive thinking. Those who walked in an urban environment showed no such change.
Rumination — the repetitive, often negative thought patterns that fuel depression — appears to be genuinely disrupted by nature immersion. That’s not a small thing.
Enhanced Attention and Cognitive Restoration
Attention Restoration Theory, developed by psychologists Rachel and Stephen Kaplan in the 1980s, proposed that natural environments provide a particular type of mental engagement — what they called “soft fascination” — that allows the directed attention systems in our brains to recover. Unlike the sharp, demanding focus required by screens, traffic, and deadlines, a forest asks very little of us cognitively. And in that restfulness, our minds restore.
Research has supported this theory repeatedly. Studies with children diagnosed with ADHD found that time in natural settings improved concentration and reduced symptoms. Adults, too, show improved performance on tasks requiring sustained attention after spending time in natural environments.
Better Sleep Quality
Sleep and mental health are deeply intertwined — poor sleep worsens anxiety and depression, and mental health difficulties often disrupt sleep. Forest bathing may help address both sides of this cycle. Research from Chiba University in Japan found that participants who took part in forest bathing trips reported better sleep quality, with longer sleep duration and improved sleep efficiency compared to those who stayed in the city. The combination of physical relaxation, reduced cortisol, and melatonin regulation from natural light exposure all appear to play a role.
Strengthened Sense of Connection and Reduced Loneliness
There’s a quieter benefit to forest bathing that doesn’t always make it into the headlines: a sense of connectedness. Many people who regularly practise shinrin-yoku report feeling more connected — not just to nature, but to themselves and to other people. This sense of belonging to something larger than one’s own worries can be profoundly grounding.
Research published in Frontiers in Psychology found that nature connection was associated with lower loneliness, greater life satisfaction, and increased prosocial behaviour. At a time when loneliness is being described as a public health crisis, this is worth paying attention to.
The Science Behind Why It Works
It’s not just about “getting some fresh air.” There are specific mechanisms that explain why forests affect us the way they do.
Phytoncides: Nature’s Chemical Messengers
Trees emit volatile organic compounds called phytoncides — essentially, the forest’s immune system. When we breathe these in, they appear to have measurable effects on our own biology. Dr Qing Li’s research showed that inhaling phytoncides increased the activity of natural killer (NK) cells in the immune system, which play a role in fighting disease. But phytoncides also appear to influence mood and stress directly, with some compounds showing anti-anxiety effects in laboratory research.
Fractal Patterns and Visual Calm
Nature is full of fractal patterns — the branching of trees, the shapes of leaves, the flow of streams. Research by physicist Richard Taylor found that the human eye responds to mid-range fractal complexity with measurable reductions in physiological stress. Our brains, it seems, are calibrated to find these patterns inherently calming. This may be one reason why even looking at images of nature reduces stress, though nothing matches the real thing.
The Role of the Microbiome
Emerging research is also exploring the connection between exposure to soil microorganisms and mental health. Mycobacterium vaccae, a bacterium commonly found in soil, has been shown in animal studies to stimulate serotonin production in the brain. While human research is still developing, it adds another intriguing dimension to why direct contact with natural environments — bare feet on earth, hands in soil — might feel so restorative.
9 Benefits of Forest Bathing at a Glance
- Lower cortisol levels — measurable reductions in the body’s primary stress hormone
- Reduced anxiety — calming of the nervous system and the brain’s fear response
- Improved mood — lower scores on depression, tension, and anger scales
- Better sleep — longer sleep duration and improved sleep quality
- Enhanced focus and attention — cognitive restoration through “soft fascination”
- Reduced rumination — disruption of negative thought loops linked to depression
- Strengthened immune function — increased NK cell activity through phytoncide exposure
- Greater sense of connection — improved feelings of belonging and reduced loneliness
- Lower blood pressure and heart rate — physical markers of a calmer physiological state
How to Practise Forest Bathing
The beauty of shinrin-yoku is its accessibility. You don’t need expensive equipment, specialist training, or a particular level of fitness. What you do need is a willingness to slow down.
Finding Your Space
Ideally, forest bathing takes place in a wooded area — a forest, woodland, or tree-filled park. The denser and more natural the environment, the better, but research suggests that even urban parks with significant tree cover offer meaningful benefits. You don’t need a remote wilderness. A local woodland, a National Trust estate, or a well-wooded common can all serve the purpose.
How to Actually Do It
- Leave your headphones at home. The sounds of the forest — birdsong, wind, rustling leaves — are part of the therapy.
- Put your phone away, or at least on silent. Resist the urge to photograph everything.
- Walk slowly. There is no distance to cover and no pace to maintain.
- Pause often. Sit against a tree, stand and look upwards through the canopy, or simply stop walking for a while.
- Use all your senses. Notice textures, temperatures, smells, and sounds. What can you feel beneath your feet? What can you smell on the air?
- Aim for at least 20–30 minutes, though longer sessions (two hours or more) appear to produce greater benefits.
Can You Forest Bathe Alone or in a Group?
Both work well, and the choice depends on what you need. Solo sessions can be deeply meditative and offer genuine solitude, which has its own restorative qualities. Group sessions — sometimes guided by a certified forest therapy guide — can provide a sense of shared experience and community. Certified guides are trained to offer gentle prompts and invitations to deepen sensory awareness, which some people find helpful, particularly when they’re new to the practice.
Forest Bathing for Specific Mental Health Challenges
While forest bathing is not a clinical treatment and should never replace professional mental health care, it has shown particular promise as a complementary support for several common conditions.
For those managing anxiety disorders, the physiological calming effect on the nervous system can offer meaningful relief, especially when practised regularly. For people recovering from burnout or chronic stress, the cognitive restoration it provides can help rebuild a depleted system. For individuals living with mild to moderate depression, the combination of mood-lifting, rumination-reducing, and connection-building effects makes it a valuable addition to broader wellbeing practices.
Researchers are also exploring its potential for supporting people with post-traumatic stress, with early findings suggesting that natural environments may help regulate the hyper-vigilant threat responses that characterise PTSD.
In Summary
Forest bathing is one of those rare practices that is simultaneously ancient and evidence-based. Humans evolved in natural environments, and the research increasingly suggests that our nervous systems respond to nature in ways that go far deeper than relaxation or enjoyment. Lower cortisol, reduced rumination, restored attention, better sleep, and a greater sense of connection — these are not trivial outcomes. They represent meaningful shifts in how we feel, think, and function.
The practice asks very little: a patch of trees, a willingness to slow down, and an openness to paying attention. In return, it offers something that is increasingly rare — a genuine, sustained sense of calm. Whether you’re managing stress, navigating anxiety, or simply trying to feel more like yourself again, stepping into the trees might be one of the most straightforward and underrated things you can do for your mental health.