I wanted to share something that happened to me recently. I have been running for about 6 months and started to experience some knee pain. Of course the doctor said stop running but it is something that is hleping me lose weight. I went running with a friend who looked at me run and said that he thought the problem were with my shoes. He recommend a store to go get a new pair where you get on a treadmill and they tape your gait. After that they review it with you (just a few seconds of it) and then tell you what is happening and recommend shoes that will reduce or fix the problem.
I have a moderate pronation when I run and bought a new pair of shoes and saw the difference when I was video taped again. I have run this week with the pair and my knee feels the difference.
IT will take a while for my knee not to hurt but I felt it get better.
There are places that look at you run and it is worht getting shoes from there