Dragonchilde, I've been running for about 3-4 weeks, all on the same surface. The only thing that changed was the shoes. When I went back to my old ones, my knees only bothered me after a really long workout. I've never had knee problems before. Also, I just chose a pair of shoes right off the rack. Now, I know to have my foot checked for pronation or whatever and get the right pair. So for the time being, I'm not running. My knees don't even hurt today, so it may just be a time of resting for me. Thanks!
I will check out the article about exercises for people with knee problems! Thanks!