It's funny how the weather can be mild all week, then Saturday morning turn frigid. It was in the 60s Friday - Saturday morning it was in the low 30s when we left to walk, and temps dropped as we went. We were supposed to walk 5 miles, but I think we ended up going farther. I took it easy and felt pretty good. Shortly after I got home though, I could feel my knees swell up. I iced them, but they were still swollen. So, this week I'll try more icing and some knee strengthening exercises and see how it goes.