I've had back issues ever since being rear-ended by a Mack truck, literally, many years ago. Whenever my back acts up, I find a lot of relief in doing yoga focused on the back. In particular, I've been using this dvd forever: http://www.amazon.com/Yoga-Rest-Us-B...ds=peggy+cappy, and recently discovered this one, which has a great segment focused on the lower back, along with a really nice variety of stress relieving poses: http://www.amazon.com/Yoga-Stress-Re...elaxation+yoga. My lower back was recently killing me after spending hours outside shoveling snow and using the roof rake; I did the low back tension segment for 20 minutes and when I was done, the pain was gone and stayed gone.
2001 Trek 7500 FX, converted to a hauler - Serfas
200? Marin hybrid - Selle San Marco
2004 Trek 5200 - Avatar
2011 Trek 6.2 Madone - Ruby