> I love walking and would do it more often, but how have you kept up the health of your knees? If I walk (like walking from A > B in one go) more than about 2

> I love walking and would do it more often, but how have you kept up the health of your knees? If I walk (like walking from A > B in one go) more than about 2 hours a day by the 3rd or 4th day my knees start to feel it. I dunno. I used to spend time on a treadmill, too, and that really killed my knees, so it's not just some super strong joints. I think you just get used to it; I started when I was 20 (though I've scaled it up over time), and that probably helps.