uncw,
i have read something similar to what your brother is going through online. i do not think it is hirayama's though. i forget what they called it. i will try to find the link again and post it up hopefully within the next couple of days.
also has anyone found any good excercises to do to help? my forearms are looking scraggly as well ive noticed, but nothing i do seems to help. i think this winter did a number on me. riding season is coming up, but sadly i think it will turn out to be my last. i will have to try to make the best of it i guess. hmmfff