I used to be an avid walker, at least an hour a day back and forth to work, and long walks with the dogs around my home (lucky to live in a beautiful area in the PNW with close beaches and lots of trees, so plenty to enjoy.) I've been walking since I was a kid, as it was the only way to get back and forth to school and town growing up in the Berkeley hills. Though I resented it as a kid, I grew in to loving walks.<p>I've been developing severe osteoarthritis in my knees over the last decade since I hit my 40's, and now it's so bad, I'm unable to walk more than about 10 minutes. It's had a tremendous negative impact on my physical and mental health, especially as it was coincident with the pandemic. I've "replaced it" with biking, but for some reason, it just doesn't do as much for me as walking did. I've gained about 30 pounds, I'm tired all the time, and for the first time ever, feeling a little blue now and then and not doing other things I used to enjoy (very mild though, my wife has major depression and mine is a blip comparatively.) I guess I'm a living testament to how important walking is.<p>I like the timing of this article for myself. On the bright side, I'm getting one of my knees replaced next week, and the other hopefully in 6 months if recovery goes well. I am really looking forward to daily walks again and getting back to that healthy place I was in for so long!