Tuesday, September 17, 2019

Why Forest Bathing Is Good for Your Health

Though any kind of nature can enhance our health and happiness, there’s something special about being in a forest.


“Nature deficit disorder” is a modern affliction. With more people living in cities, working in high-rise office buildings, and becoming addicted to their innumerable electronic devices, many of us are indeed experiencing a nature deficit. This is true for children and adults alike.

In his new book, Forest Bathing: How Trees Can Help You Find Health and Happiness, Japanese medical doctor and researcher Qing Li presents some sobering statistics: By 2050, according to the United Nations Population Division, three quarters of the world’s people will live in cities. Even now, the average American spends 93 percent of the time indoors, and some ten hours a day on social media—more than they spend asleep.

kumano kodo trail in japan

In Japan, there’s enough awareness about this deficit that Li heads up an organization called The Japanese Society of Forest Medicine, which promotes research on the therapeutic effects of forests on human health and educates people on the practice of forest bathing. His book—a companion to the center he runs—explores research on these benefits, while offering a number of techniques we can use to enhance them.

Some people study forests. Some people study medicine. I study forest medicine to find out all the ways in which walking in the forest can improve our well-being,” writes Li.

The history of forest bathing.

Japan is a country that is both urbanized and heavily forested. Trees cover two-thirds of the island’s landmass, and yet a majority of Japan’s people live in crowded city conditions. Li himself lives in Tokyo, a city he describes as “the most crowded city in the world.”

Perhaps that’s why the art of “forest bathing”—shinrin-yoku—began there. Forest bathing involves slowly walking through a forest, taking in the atmosphere through all your senses, and enjoying the benefits that come from such an excursion.

In 1982, Japan launched a national program to encourage forest bathing, and in 2004, a formal study of the link between forests and human health began in Iiyama, Japan—a place particularly known for its lush, green forests. Now, each year upwards of 2.5 million people walk those forest trails as a way to ease stress and enhance health.

Li’s interest in forest research began when he was a stressed-out medical student. He went away for a week of forest camping, and found it restored his physical and emotional health. That inspired him to begin researching the benefits of forests on human health and well-being. In 2004, he helped found the Forest Therapy Study Group, aimed at finding out why being among trees makes us feel so much better.

The healing power of the forest
After years of careful study, Li has found that spending time in a forest can reduce stress, anxiety, depression, and anger; strengthen the immune system; improve cardiovascular and metabolic health; and boost overall well-being.


“Wherever there are trees, we are healthier and happier,” writes Li. And, he adds, it isn’t about exercising—like hiking or jogging—it’s simply about being in nature.

Why would this be? It’s long been recognized that humans have a biological need to connect with nature. Some 20 years ago, American biologist E. O. Wilson noted that humans are “hardwired” to connect with the natural world, and that being in nature had a profoundly positive effect on human health.

Li’s research seems to corroborate this. For example, one of his studies looked at whether forest bathing could improve sleep patterns among middle-aged Tokyo office workers who tended to suffer sleep deficiency due to high levels of stress. During the study, participants walked the same amount of time in a forest that they usually did in a non-forest setting on a normal working day. After a walk in the forest, participants were significantly less anxious, slept better, and slept longer. In addition, researchers found that afternoon walks were even more beneficial than morning walks.

“You sleep better when you spend time in a forest, even when you don’t increase the amount of physical activity you do,” reported Li.

To further assess the effects of time spent in a forest, Li measured people’s moods before and after walking in the woods or in an urban environment. While other studies have shown that walking anywhere outdoors reduces depression, anxiety, and anger, Li found that only the experience of walking in a forest improved people’s vigor and reduced fatigue.

The health secrets of trees seem to lie in two things—the higher concentration of oxygen that exists in a forest, as compared to an urban setting, and the presence of plant chemicals called phytoncides—natural oils that are part of a plant’s defense system against bacteria, insects, and fungi. Exposure to these substances, says Li, can have measurable health benefits for humans. Physiological stress is reduced, for example, and both blood pressure and heart rate are lowered. Evergreens—pine, cedar, spruce, and conifers—are the largest producers of phytoncides, so walking in an evergreen forest seems to have the greatest health benefits.

How to do forest bathing
So, is there a specific art to forest bathing? Or is it just as easy as a walk in the woods?

Connecting with nature is simple, writes Li. “All we have to do is accept the invitation. Mother Nature does the rest.” Here are some of his suggested steps.

Find a spot. Depending where you are, find a good source of nature. One doesn’t need to journey deep into a forest for these benefits. Just look for any green area. It could be an urban park, a nature preserve, or a trail through suburban woods. Forests with conifers are thought to be particularly beneficial.

“Let your body be your guide. Listen to where it wants to take you,” Li says. Some people will respond to sunny glades, others to shadier places. Listen to your own wisdom. For people who don’t have access to a forest, or can’t get outside for some reason, infusing essential tree oils in your home can provide benefits, too.

Engage all your senses. “Let nature enter through your ears, eyes, nose, mouth, hands, and feet,” says Li. Actively listen, smell, touch, and look. “Drink in the flavor of the forest and release your sense of joy and calm.”

Don’t hurry. Slow walking is recommended for beginners. And it’s good to spend as much time as possible. You’ll notice positive effects after twenty minutes, says Li, but a longer visit, ideally four hours, is better.

Try different activities. Try doing yoga in the woods, or Tai chi, or meditation. Take a picnic. Write a poem. Study plants. You can venture alone, or with a companion. In Japan, forest walking therapists are even available.

Appreciate the silence. One of the downsides of urban living is the constant noise. If you’re lucky, you’ll find a wooded area that’s free from human-produced sound. Silence is restorative, and a forest can have its own healing sound—rustling leaves, a trickle of water, birdsong. Spend a few quiet moments with a favorite tree. If nothing else, when we connect with nature we are reminded that we are part of a larger whole. And that, Li notes, can lead us to be less selfish and to think more of others.


Li’s book, which includes illustrations and a map of “40 Beautiful Forests Across the World,” is an invitation and an inspiration to take a walk in the woods, wherever you are.





How to Protect Kids from Nature-Deficit Disorder
Richard Louv explains how parents, educators, and urban planners can help kids reconnect with nature—before it's too late.

Today’s kids spend less and less time outdoors, and it’s taking a toll on their health and well-being. Research has shown that children do better physically and emotionally when they are in green spaces, benefiting from the positive feelings, stress reduction, and attention restoration nature engenders.

No one has brought attention to this issue more than Richard Louv, co-founder and chairman emeritus of the Children & Nature Network and author of Last Child in the Woods, The Nature Principle, and, most recently, Vitamin N: 500 Ways to Enrich the Health & Happiness of Your Family & Community. Louv has written eloquently about the importance of nature for children and what they miss by spending too much time indoors. His books have inspired many parents and educators to more thoughtfully incorporate outdoor experiences into children’s daily lives.

Louv also warns about the consequences for the environment if we don’t raise children who truly have a personal relationship with nature. In our interview, he explains just how dire the problem is and how parents, educators, and urban planners can help kids reconnect with nature wherever they are.


Jill Suttie: You’ve written that today’s kids have “nature-deficit disorder.” What does that mean, and why is it important?



Richard Louv: “Nature-deficit disorder” is not a medical diagnosis, but a useful term—a metaphor—to describe what many of us believe are the human costs of alienation from nature: diminished use of the senses, attention difficulties, higher rates of physical and emotional illnesses, a rising rate of myopia, child and adult obesity, Vitamin D deficiency, and other maladies.

Because researchers have turned to this topic relatively recently, most of the evidence is correlative, not causal. But it tends to point in one direction: Experiences in the natural world appear to offer great benefits to psychological and physical health and the ability to learn, for children and adults. The research strongly suggests that time in nature can help many children learn to build confidence in themselves, calm themselves, and focus.

Studies also indicate that direct exposure to nature can relieve the symptoms of attention-deficit disorders. By comparison, activities indoors—such as watching TV—or activities outdoors in paved, non-green areas leave these children functioning worse. 

Today, children and adults who work and learn in a dominantly digital environment expend enormous energy blocking out many of the human senses in order to focus narrowly on the screen in front of the eyes. That’s the very definition of being less alive, and what parent wants his or her child to be less alive?

JS: How will this trend impact pro-environmental attitudes and behaviors in kids?

RL: If nature experiences continue to fade from the current generation of young people, and the next, and the ones to follow, where will future stewards of the earth come from?

Past research has shown that adults who identify themselves as environmentalists or conservationists almost always had some transcendent experiences in the natural world. What happens if that personal experience virtually disappears?

There will always be conservationists and environmentalists, but if we don’t turn this trend around, they’ll increasingly carry nature in their briefcases, not in their hearts. And that’s a very different relationship.

JS: Are there particular kinds of experiences in nature that seem to have the most impact on kids?

RL: The quality of the nature experience depends on how direct the experience with nature is. Are kids getting their hands wet and their feet muddy? These types of activities can help kids learn to have confidence in themselves and power to make independent decisions. 


One reason for this is the risk-taking inherent in outdoor play, which plays an important role in child development. Without independent play, the critical cognitive skill called executive function is at risk. Executive function is a complex process, but at its core is the ability to exert self-control, to control and direct emotion and behavior. Children develop executive function in large part through make-believe play. The function is aptly named: When you make up your own world, you’re the executive. A child’s executive function, as it turns out, is a better predictor of success in school than IQ.

JS: What can parents do to help increase caring for nature in their kids?

RL: If children are given the opportunity to experience nature, even in simple ways, interaction and engagement follow quite naturally. But parents can sometimes push too hard. Nature time should never be seen by kids as a punishment for, say, spending too much time in the electronic world.

Perhaps the best way to do this is by example. When parents rediscover their sense of wonder, so do most kids. Many parents tell me that the same kids who complained on the way to the camping trip often, when they’re young adults, recall that camping trip as one of their fondest memories—which (as you might guess) causes mixed emotions in the parents! One thing to keep in mind: People seldom look back on their childhoods and recall the best day they ever spent watching TV.

JS: How can parents help kids care about nature when they live in urban environments without ready access to wild spaces?

RL: Any green space will provide some benefit to mental and physical well-being. In urban areas, more natural landscapes can be found in a park, a quiet corner with a tree, several pots with vegetables growing outside, or even a peaceful place with a view of the sky and clouds.

Connection to nature should be an everyday occurrence, and if we design our cities—including our homes, apartments, workplaces, and schools—to work in harmony with nature and biodiversity, this could become a commonplace pattern.

Individually, we can help bring back the food chain and improve biodiversity by transitioning our yards or other properties to native species. Schools, workplaces, and city policymakers can do the same thing. We do know that the greater the biodiversity in an urban park, the greater the psychological benefits to people. Why not think of cities as incubators of biodiversity and engines of human health?

JS: What can parents do if their kids are afraid of nature or if they themselves are disconnected from nature?

RL: Many children and young adults simply don’t know what they’re missing. It’s never too early or too late to teach children or adults to appreciate and connect with the outdoors. 

Rachel Carson often said that a child’s positive connection to nature depends on two things: special places and special people. As parents and educators, we can spend more time with children in nature. We can go there with them. Taking time to do that can be quite a challenge. Getting kids outside needs to be a conscious act on the part of parents or caregivers. We need to schedule nature time. This proactive approach is simply part of today’s reality.


My new book, Vitamin N, includes 500 actions that people can take to enrich the health and happiness of their families and communities—and to help create a future that we’ll all want to go to.

JS: What can schools do better to help kids develop an affinity for nature? 

RL: While many school districts in the U.S. are going in the opposite direction—toward less physical movement and more testing, more hours at desks or in the classroom—a counter trend is growing, toward school gardens, natural play areas, getting kids out of the classroom. We’re beginning to see the true greening of American education. In education, for every dollar we spend on the virtual, we should spend at least another dollar on the real, especially on creating more learning environments in natural settings.

Ultimately, we need to accomplish deep cultural change. We need to incorporate nature education and knowledge of its positive benefits into the training that every teacher receives. We need to credit the many teachers who have insisted on exposing their students directly to nature, despite trends in the opposite direction. Teachers and schools can’t go it alone—parents, policymakers, and whole communities must pitch in.

Recently, I visited a nature-based elementary school in a lower-income region of a county in Georgia. The school is showing more academic improvement than any other school in that county. The kids are generally healthier, as well.

We need, and I believe we see already growing, a cultural movement– what I call a New Nature Movement—that includes but goes beyond great programs that directly connect kids to nature: a movement that includes but goes beyond traditional environmentalism and sustainability, a movement that can touch every part of society. The object is to give children the gifts of nature they deserve, and for all of us to find kinship with the lives around us, and wholeness in the lives we live.

JS: What kinds of environmental education programs make the most difference in increasing a child’s connection to nature and their willingness to protect it?

RL: Programs that infuse education with direct experience, especially in nature, have the greatest impact. For many, the natural environment has been intellectualized or removed. Young people certainly need to know about threats to the environment, but they also need direct experience in nature just for the joy of it. Unless we achieve that balance, many children will associate nature with fear and destruction for the rest of their lives.

Too many students learn about climate change in windowless schools. While including environmental education in the curriculum, many school districts in the U.S. have banished live animals from classrooms, dropped outdoor playtime and field trips, and overloaded classrooms with computers.

Connecting our children directly to nature is a way to both deal with the impact of loss of nature and to plant the seeds, sometimes literally, of a nature-rich future.

JS: What are some more positive trends that you’ve observed?

RL: We’re seeing new appreciation for these issues among parents, educators, pediatricians, mayors, and others.

The National League of Cities (which represents 19,000 municipalities and 218 million Americans) and the Children & Nature Network announced a three-year partnership, the Cities Promoting Access to Nature initiative, to explore how municipalities can connect people with the natural world where they live, work, learn, and play. 

We also see the emergence of biophilic design of our homes and workplaces, reconciliation ecology and human-nature social capital, restorative homes and businesses, eco-psychology and other forms of nature therapy. We see more citizen naturalists, nature-based schools, the Slow Food and simplicity movements, organic gardening, urban agriculture, vanguard ranching, and other forms of the new agrarianism.


As these currents join, they’ll lead us to a different view of the future—a nature-rich future. The barriers are still there, but I do believe there’s more hope in the air, if you look for it.

<a href=“http://www.amazon.com/gp/product/052555985X?ie=UTF8&tag=gregooscicen-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=052555985X”><em>Forest Bathing: How Trees Can Help You Find Health and Happiness</em></a> (Viking, 2018, 320 pages)

Look inside the book,  click here

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