It hurts when I do lunges, but not always, and sometimes when I climb stairs. I have noticed that I've become cautious when climbing, favoring my left knee, especially. The noise does bother me, but the crackling itself doesn't really hurt, just the ligaments/tendons that move my body up and down in the lunge/stair climb itself.

I'm doing the Core Performance workouts and I'm entering week four. http://www.amazon.com/Core-Performan...0727508&sr=8-1 DH finished it and it really helped him change his body shape and improve his cycling power.

When Dr. Matt did some manipulation of my knee, he squeezed around my kneecap and that hurt, and he suggested there was some inflammation there. He wants me to ice my knees after every workout.

Trek, it's encouraging that you're running even with bad knees. I'm only 45. I don't want to have long-term knee problems that prohibit my getting around, much less riding or running or swimming. I'm having fun here.

Roxy