The Science of Nature Therapy: Why does being in nature make me feel better?

Photo from Pexels by Pavel Danilyuk You step out of your office and spend your time strolling by the shore, and something loosens. Your shoulders drop. Your breathing slows. The problems on your plate don’t disappear, but it suddenly feels a little smaller or even more manageable.

It isn’t just in your head, or rather, it is, in a very measurable way. Researchers have spent decades studying why time in nature makes us feel better, and the answers say a lot about how we should be building our cities.

Nature therapy, also called ecotherapy, uses the natural world as part of caring for our mental and physical health. It can be as guided as a session with a trained facilitator or as simple as a walk you take on purpose. A few common forms:

Forest bathing. Known in Japan as shinrin-yoku, it’s a slow, unhurried walk among trees where the only goal is to notice what you see, hear, smell, and feel. No step count, no destination.

Horticultural therapy. Gardening with a purpose: planting, tending, and harvesting, often used in hospitals, rehab centers, and community programs to help people recover, reconnect, and rebuild routine.

 Photo from Pexels by Teona Swift Outdoor mindfulness walks. Paying full attention to the present moment while moving through a green space, from the feel of the ground underfoot to the sound of the wind in the leaves.

Photo from Pexels by Dongdilac

Blue spaces. Time near the sea, rivers or lakes, which many people find especially calming.

The concepts share a common thread: they put you in contact with living things, and they make you more present.

Nature gives a tired brain a break. City life demands constant, focused attention: dodging traffic, reading signs, answering notifications. In the late 1980s, psychologists Rachel and Stephen Kaplan developed Attention Restoration Theory, which proposes that directed attention, the deliberate, effortful focus we use to work, navigate traffic or tune out noise, gets worn out with use, while nature holds our attention gently and lets it recover. Leaves moving, clouds drifting and water rippling are interesting without being demanding, so the mind gets to rest and recharge.

It calms the body’s stress response. Time among trees has been linked to lower levels of cortisol, the stress hormone, along with lower heart rate and blood pressure. Your body shifts out of “alert” mode and into “rest” mode.

It quiets the worry loop. In a Stanford study (2015), people who took a 90-minute walk in a natural area dwelled less on negative thoughts afterward than people who walked along a busy road. Brain scans also showed less activity in an area tied to that kind of repetitive brooding.

Even a view helps. As early as the 1980s, studies have supported this. One particular study showed hospital patients recovering from surgery in rooms that looked out on trees went home sooner and needed fewer strong painkillers than patients whose windows faced a brick wall.

The air itself may play a part. Trees release natural compounds into the air. Japanese researchers have found that time in forests may boost the activity of certain immune cells, though scientists are still working out exactly why.

Sunlight does its part, too. Being outdoors usually means being in daylight, and light affects brain chemistry. A 2002 study in Australia found that the brain produced more serotonin, a chemical closely tied to mood, on days with more hours of bright sunlight. Sunlight on our skin also helps the body make vitamin D, which researchers believe helps switch on serotonin production in the brain. In a tropical country, a little morning sun goes a long way; there’s no need to bake at noon.

The benefits may last a lifetime. A large study in Denmark in 2019 found that children who grew up surrounded by more green space had a significantly lower risk of developing mental health conditions as adults.

A 2019 study of nearly 20,000 people in England found that those who spent at least 120 minutes in nature weekly were more likely to report good health and wellbeing. It didn’t matter whether the time came in one long outing or several short ones. The pattern held for men and women, young and old, and people in richer and poorer areas alike.

But you don’t need to keep planning those fancy Instagrammable vacations! In fact, most of the nature visits measured in the study happened within a few kilometers of people’s homes. The benefit came less from far-off mountains and more from the neighborhood park.

A few easy ways to get your two hours:

Take your coffee or lunch break outside, under a tree if you can find one.

Choose the shaded, tree-lined route on your walk, even if it adds five minutes.

Visit a nearby park on weekend mornings, before the heat sets in.

Grow something, even just a few herbs or potted plants on a windowsill.

Leave your phone in your pocket and simply notice what’s around you.

If the biggest benefits come from nature close to home, then nature therapy can’t just be a personal habit. It has to be built into the places where we live.

The World Health Organization recommends at least 9 square meters of green space per person, within a 15-minute walk from home. Metro Manila has been reported to offer only about 5 square meters per person, and in the City of Manila, estimates put it at under 1 square meter. Two hours a week in nature is easy advice to give, but much harder to follow when the nearest park is a jeepney ride away and the walk there has no sidewalk or shade.

Green space also does double duty in a warming world. Shade lowers street temperatures during heatwaves, and trees and wetlands soak up floodwater. Planting (and protecting) trees city streets shouldn’t just be for aesthetics, it also helps our minds and our climate.

The calm you feel under a tree isn’t your imagination. It’s your brain resting, your stress dropping, your body remembering what it’s like to slow down. Nature therapy can be a gentle complement to professional mental health care, though not a replacement for it.

Everyone deserves that calm so take time outside when you can. And when you can, speak up for the parks, the trees and the walkable streets that make nature part of everyday life for everyone.