heres my situation. whenever I run past 6-7 miles, my knee begins to hurt and it is basically out of use for the rest of the day. The next day I am fine. If I run less than 4 miles, I have no pain. just wondering if anyone else had this issue and what you did. I am thinking it is runner's knee. I have been increasing the weight when I do some leg exercises which involves bent knees - not sure if this caused it...never really had pain (not great for runner's knee). I also dont have a special "running shoe" persay. any experience with this?