The brain fog fix was lying outside and doing nothing

For a while I've had brain fog, the kind where thinking clearly takes more effort than it should.

I tried the usual fixes. I went on walks. I moved my work desk to the window. I made a point of getting more fresh air. Each one helped a little, but none of them cleared it.

The clue came from somewhere I wasn't looking: my commutes. I kept noticing that my clearest thinking happened in transit, when I wasn't trying to think about anything in particular.

Where the idea came from

I was describing my week to my therapist. Work, then pickleball, then sleep, then work again. She pointed out that even my rest was in service of getting back to work. I was always rushing to the next thing. Her line stuck with me: "You're a human being, not a human doing."

Her homework was Savasana, the pose at the end of a yoga class where you lie on your back and do nothing. On the floor, not the bed. Start at five minutes and build to ten. Notice what comes up. And catch yourself when you start designing a "productive" version of rest. She called it the hardest pose to stay in.

She was right about that. Before I even lay down, part of me objected that I should be using the time for something.

What it looks like for me

I lie on a yoga mat outside on my balcony, face up, with nothing to produce. In the first few minutes, three to five background "I have to do X" thoughts show up. When one does, I let it run until it feels finished instead of pushing it away to get back to work. When I write them down, I can see that most of them can wait.

Afterwards the fog is gone. It clears out the things that are pulling at my attention without my noticing, and it lets me refocus on what's actually important.

Why doing nothing might work

I'm not a scientist, but the research lines up with what I noticed:

• The resting brain isn't idle. In 2001, Marcus Raichle and colleagues described a set of brain regions that are more active when people lie quietly with their eyes closed than when they do a focused task (Raichle et al., 2001, PNAS). It's now called the default mode network.
• That network does real work. A review titled "Rest Is Not Idleness" links it to recalling memories, imagining the future and making sense of our own experiences. The authors argue that constant demands on our attention can crowd that reflection out (Immordino-Yang et al., 2012).
• Letting the mind wander helps stuck problems. People who took a break on an easy task that let their minds wander came back with more creative answers to problems they'd already seen (Baird et al., 2012, Psychological Science). A plain rest break didn't help in that study. That fits my commute: low effort, but not zero input.
• Quiet rest helps things stick. People who rested quietly for ten minutes after hearing a story remembered more of it, even a week later, than people who played a spot-the-difference game (Dewar et al., 2012).
• Being outside helps too. Attention Restoration Theory says nature holds our attention gently, which lets tired focus recover (Kaplan, 1995). In experiments, a nature walk improved attention more than a city walk (Berman, Jonides & Kaplan, 2008). A 90-minute nature walk also reduced rumination, the loop of repetitive negative thinking (Bratman et al., 2015, PNAS).
• The pose itself. In a small 1998 study, heart rate and blood pressure recovered faster after exercise in Shavasana than sitting or plain lying down (Bera et al., 1998). A 2026 review of 73 studies of yoga nidra, a guided lying-down rest, found drops in stress and anxiety, though the authors warn the studies were low quality and the effects are likely inflated (Ghai et al., 2026).

None of these studies tested my exact setup, and some are small. But they point the same way: the brain needs unscheduled time to finish its own work.

The actual lesson

My guess is the fog was a backlog. A full workday never gives half-formed thoughts the space to finish, so they pile up in the background. Walks and a window seat changed my surroundings, but I was still busy. The commute worked because it was the only unscheduled stretch in my day. So now I schedule one, and I try to remember that I'm a human being, not a human doing.