You actually made me reconsider how I think about this. My initial reaction to the article was that I suspect the benefit is less about the walking and more abo

You actually made me reconsider how I think about this. My initial reaction to the article was that I suspect the benefit is less about the walking and more about the time spent contemplating, thinking, and the way our mind works when walking. I wasn't at all thinking about the challenges of somebody who cannot walk, and you opened my eyes to the idea that for someone in a wheelchair, "rolling" doesn't really compare. I get that there is probably some cognitive load navigating with a wheelchair create, but I thought that would disappear, and the idea of "movement" would be the same, but it looks like I'm wrong about that.