Exactly, general exercise cannot be simplified to one specific technique that has inter and intratherapist validity. This is the point...neither can the human being. You have hit the nail on the head by the fact that something that occurs during exercise affects low back pain in a positive fashion. Trying to isolate that to one thing is proving very difficult and not particularly relevant. We should spend more time on what is the best form of exercise to combat LBP in the general population, of course with the assistance of all manual therapy techniques at our disposal.

:rolleyes