Alright Dar, you better get this problem taken care of. I want to kick your butt fair and square in that Duathlon.
My daughter had alot of problems with her shins and feet when she was younger. Part of it, according to the doctor, was something like her bones were growing to fast for her muscles, if I'm remembering correctly. She did therapy for awhile and then ended up getting inserts for her shoes. They really made a big difference.