Left knee is hurting on the sides and above the knee cap when I walk. Right knee is popping when I walk, but not as much pain. When I ride, I do not notice the pain at all on either knee. Last couple of rides, I have been using the third ring (big) almost exclusively in order to simulate a harder ride. I do not have hills, so I was trying to create a harder ride to simulate the lack of an up hill climb.

No throbbing when at rest...just when walking