Not metaphorically. Not in a feel-good, self-help kind of way.
Actually grow. Bigger. Measurably.
In 2011, researchers took a group of older adults, late sixties on average, and split them in two.
One group walked. Three times a week. Nothing dramatic. Just brisk walking.
The other group stretched.
A year later, they scanned everyone's brains.
The walkers' hippocampus, the part of the brain that runs your memory, had grown. About two percent.
The stretchers' had shrunk. Which is what everyone expected. What normally happens with age.
Walking had reversed one to two years of age-related brain shrinkage. Not slowed it. Reversed it. With walking.
I teach movement for a living, and I've watched some version of this play out for years, the fog lifting, decisions getting easier, people telling me afterward that they feel more like themselves, without being able to say exactly why. I used to file that under "nice side effect." A mood thing.
It isn't. It's neurological. It's measurable. It's been sitting in the research for over a decade.
Here's The Part That Actually Matters
Most of us have quietly decided that memory loss is just what happens. A dice roll. Something you either get unlucky with or you don't, mostly out of your hands.
That belief is comfortable. It's also costing people more than they realise.
Because if a meaningful part of this is actually decided by what you do, starting well before anyone would call you old, and continuing long after most people assume it's too late, then the real question isn't "will my memory hold up."
It's: what did I do this year, that either protected it or didn't?
What This Doesn't Require
Nobody in that study trained like an athlete. No equipment. No gym membership. No suffering at 6am because an app told them to.
Just walking. Regularly. For months.
If the word "exercise" makes you picture punishment, you're picturing the wrong thing. Picture something you could still be doing in ten years, because you actually want to.
Before You Close This
I don't think this is really about walking.
I think it's about whether you've quietly decided the version of you at 70, at 80, is worth investing in, or whether you filed yourself under "maintaining" instead of "building" a while ago and never noticed.
That decision comes first. The walking is just what it looks like afterward.
So, what have you quietly stopped doing, that you assumed didn't matter?
If this is the kind of thing you want more of, movement, ageing, brain health, and how much more connected they are than we're told, join the list. I'll only ever send you what's actually worth your inbox.
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