Hi Symbolic, I notice our posts to Bill our similar, I hope you dont mind me jumping on board. Im looking for a workout that will be easier on my back as well, check these out...
daily warm up...
http://www.ahs.uwaterloo.ca/~mcgill/...adersguide.pdf
workout...
http://www.mensfitness.com/fitness/workout/81
I havnt heard any objections yet, but the bodyweight stuff seems reduce the load on the lumbar and also works with stability.
Thought you may be interested.
David.W