I was diagnosed with "runners knee" a little over a year ago. I was encouraged to stop running such long distances (more than 6 miles), run on non-paved surfaces, and vary my workouts more to strengthen my knees and surrounding muscles. I have started to wear (when I remember) those knee band things that help your patella stay in place and it has helped immensly. Also, try stretching your IT band. Most of the time Drs will focus in on hamstring, quads, hips as the offending areas when many times knee pain is due to tight IT bands..