I decided today to do something a little bit different. I needed to get somewhere that is over 5k from the house, so I walked there and back (11k total). It was completely urban walking (part of it through a mall). I had to stop for traffic lights, and negotiate other pedestrians on a busy street. In fact, TIFF is on right now in Toronto, and I walked down King Street, dodging all kinds of people, trying to get through crowds at one point who were all snapping pictures of I don't know who those famous people are. (Side note: fame is a very strange thing.)
Walking the 5k has become, well not easy, but expected. My body has adapted to walking that distance. Even when I change the route up, walking 5k, or approximately 50 minutes, has become normal. So today I walked the 5k (plus a little bit), then I walked around inside the Mountain Equipment Coop for a while (I didn't track how far I walked inside the store). I was there for quite a while, trying to find a backpack, wanting to even out the load on my body of carrying something (refer to the post Walk, Squash, Walk), but not wanting to look like I'm about to climb Everest. Success! THEN, I turned around and walked ANOTHER 5k (plus a little bit). And now I'm home and my body is tired.
I think it would be an interesting thing to make one walk each week longer, and see how it affects my shorter walks, as well as other activities.