I am also a habitual walker, though I don't typically get eight miles in. I often listen to books and podcasts while walking and at times wonder if I'm doing my

I am also a habitual walker, though I don't typically get eight miles in. I often listen to books and podcasts while walking and at times wonder if I'm doing myself a disservice by not just letting my mind wander. One the one hand, it is about the only time I allow myself a solid hour to listen to something, but on the other maybe it's time better spent giving 'space to work' as you say.