Originally Posted by calamarichris

Veteran of two back surgeries here. Do a very careful & thorough stretch at the end of your ride, before you get in the car. If you can, try to park your car near a place with a patch of shady grass so you can lay out, stretch your back and really elongate your spine. Take at least 15 minutes to do this. Breath deeply and let your tense back muscles relax.
And stop every hour on your car drive and walk around for a few minutes and stretch your back.
Also check your local library for yoga dvds. After checking it out so many times, I finally bought this one. IMO it's easier to concentrate on your breathing, posture and spine when this little Asian dude is showing you how, than when in a room surrounded by young, fit, scantily-clad women.