[PBL450]

I am of an rapidly growing belief that what you're describing is a common functional problem for many cyclists, and that the root cause is core strength. You might find some help in a book that deals exactly with that subject titled Tom Danielson's Core Advantage: Core Strength for Cycling's Winning Edge. The exercises (no equipment needed) are pretty simple, typically take 15-20 min's per workout, are developed for the specific functional needs for cycling, and glutes are well covered.

Thanks man! Just ordered it. Are you familiar with Mark Verstagen and his Core Performance series? I'm a big fan. But this, designed for cyclists, looks like a great read.