after riding hard (lots of hills, standing and climbing, sprints etc) I feel sore in my quads, but only the lower half near the knee--the vastus medialis and vastus lateralis I think. I almost never feel sore in my upper quadricep closer to my groin, the rector femoris.
my question is: is this normal? or does it suggest a fit problem? (ie using only one part of my leg while cycling.) I have had some knee problems in the past so I'm curious if the lower-quad-only soreness is somehow indicative of why.