As a recent graduate of C25K, and the fittest and happiest I've ever been, I have been feeling some pain in my right knee after a 30 minute run. I should specify that I am a treadmill runner (is that a "real"runner?) so I put the incline on 1 to simulate outside terrain. Do you think the incline is the problem? And what exercises could I do to strengthen the muscles around my knee? I want to keep running 3 days a week for 30 minutes forever and I am afraid my knee will stop me. Any suggestions?