Since I started cycling, I've noticed that my quads not only look better, but feel better-nice and tight! The one thing that has been bothering me though is that the left leg is nice and round on the front of the quad, but the right leg still seems flat. I am very right-legged, so this surprises me. I wonder if I could be that I baby that leg because of a knee problem? Anybody else notice a diff between leg muscle development?