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Living better

What lakes and trees do for my nervous system

The short answer

Does nature help mental health?

For most people, yes. Time outside, especially near trees or water, tends to lower stress and lift mood a little, and it usually comes with walking and daylight, which have their own evidence for depression. It won't treat serious depression or an anxiety disorder on its own, but it's one of the cheapest ways to calm an overloaded nervous system.

There's a lake at the end of my road. Most mornings, if I get myself down there with a coffee before my brain fully boots up, the day goes better. Not great. Better.

That's about as scientific as I'm going to get to start.

Does nature help mental health? For most people, I think yes, and for me it's not even close. Being near trees and water brings my nervous system down a few notches in a way nothing indoors does. Time outside also usually comes bundled with two things that do have solid backing for mood: moving your body and getting daylight. What nature won't do is fix a real depression or an anxiety disorder by itself. I've tried that too.

Why does being outside calm me down?

I have ASD, diagnosed at 50. Most of my life I didn't know why stores, offices and parties wore me out so much faster than they seemed to wear out everyone else.

Now I get it. Indoors, and especially in town, everything is asking for my attention at once. Fluorescent lights buzzing over three conversations at the next table. My brain tries to process all of it, all the time, and by the end of an hour I'm fried.

Outside it's different noise. Wind in the pines doesn't need me to answer it. Water moving on rocks doesn't have a tone of voice I have to decode. There's plenty going on, but none of it is about me, and none of it expects a response. For an autistic brain that's a vacation.

The quietest my head has ever been was underwater. I used to run a dive operation in Indonesia, and on a good dive the only sound is your own breathing. No small talk is possible. I'm not saying everybody should take up diving. I'm saying there's something to environments where the social channel is switched off.

What does the research say about nature and mental health?

There's a pile of it, and honestly some of it is oversold. "Forest bathing" articles throw around numbers I don't trust enough to repeat here. I'll stick with what's boring and solid.

The World Health Organization's depression fact sheet lists regular exercise, "even if it's just a short walk," among the things people can do for themselves. A walk by a lake counts.

Light matters too, especially up here. For people with depression that isn't seasonal, a Cochrane review of light therapy found the effect "modest though promising," best in the morning and as an add-on to other treatment. Winter depression is its own story. I wrote about it in winter depression in Québec.

So the honest version: nature is good for you, partly because of nature and partly because getting to it makes you walk around in the daylight. I don't really care which part is doing the work.

What if I can't make myself go outside?

This is the part nobody puts on the tourism posters.

I live surrounded by lakes and forest in La Petite-Nation. It's one of the most beautiful places I know. And there are stretches where I can't get myself out the door. The lake is right there and I still don't go.

Fear of going out is something I live with. I call it the bubble: the safe little world you build at home, which gets smaller every time you skip leaving it. The cruel part is that nature is one of the things that helps, and the bubble keeps you from it.

What works for me on those days, when anything works:

Ten minutes, that's the deal. I tell myself I'll walk to the end of the road and back. That's it. If I want to keep going, fine. Usually I do.

Bring an excuse. The camera is my excuse. I'm not "going for a walk to fix my mental health," which sounds like homework. I'm going to see if the light on the water is any good this morning.

Don't make it a performance. Nobody needs to see you hiking a mountain. Sitting on a rock counts. Standing on the porch for five minutes listening to the birds counts.

Go before the excuses wake up. Early, before email, before I've had time to build a case for staying in. By noon I've usually talked myself out of it.

If going out has become really hard, not just "I don't feel like it" but fear, it's worth reading why I became scared to leave the house and talking to a professional. Agoraphobia and anxiety like that respond to treatment. Waiting doesn't shrink it.

What nature can't do

I'll say it plainly because a lot of wellness sites won't.

Fresh air is not a treatment for major depression. A forest won't stop a panic disorder. If you're struggling badly, "go for a walk" can feel like an insult, and fair enough. Do the walk and get help. In Québec, Relief (formerly Revivre) supports people living with anxiety, depression and bipolar disorder, and you can call 811 for Info-Social. The province's mental health page lays out where to start.

Also, the woods can be lonely in a way that isn't always healthy. I came out here partly for the quiet. Some days the quiet is medicine. Some days it's me hiding. I don't always know which day it is until it's over.

Questions people ask

Does walking in nature help anxiety?

For many people it brings stress down, at least for a while. It combines movement, daylight and a calmer sensory environment. It's a good tool alongside treatment, not a replacement for it if your anxiety is getting in the way of your life.

How much time outside do I need to feel a difference?

I don't trust the precise numbers floating around. In my own experience, ten or fifteen minutes is enough to feel a shift, and doing it most days matters more than doing it for hours once a week.

Is nature good for autistic adults?

A lot of autistic people find natural spaces easier than built ones, because there's less social and sensory demand. Not everyone, though. Bugs, heat, sun glare and unpredictable terrain are sensory stuff too. Find the version that works for you, even if it's a city park at 7 a.m. when nobody's there.

What if I live in a city?

Parks, rivers, a tree on your street, a balcony with plants. You don't need a lake. Look for the quietest green spot you can reach in ten minutes and go at a time when it's empty.

Sources

  1. World Health Organization, Depression fact sheet
  2. Cochrane, Light therapy for non-seasonal depression
  3. Relief (formerly Revivre), anxiety, depression and bipolar disorder
  4. Québec.ca, Mental health

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