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Without attempting to take away anything from your comment I will point out that a routine of walking a few miles a day is sufficient to reap most cognitive benefits.

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I agree.

But who actually doesn't?

We all (almost) walk a few miles (or kms) a day, without even realising it.

Most people in the US don't walk a "few" miles a day, the average is 1.5-2.5 miles (depending on the study). Our very car-centric society makes it difficult to get incidental walking distances up. If you switch to kilometers, then yes, the average person in the US walks a few kilometers a day.

I'd wager that most professional office setting americans walk less than 5000 steps a day.

I'm lucky if I even get that without supplementing with intentional exercise and I guarantee I walk more than anyone else in my office (during the work day)

I'd agree with that. Unless I'm trying to increase the amount I walk, I usually come in under 5K steps a day. It's not at all hard to add a few tasks to get it up to a more reasonable number, and I do, but if I don't intentionally add those tasks, the baseline is very low indeed.

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