I've been rigorously following the exercises in Robin McKenzies' 'Treat Your Own Back', doing a variety of sit ups and rolls ever hour and a half or two hours, six to eight times a day. I think it's making a difference - though I've said that before, about other treatments. Still, I'm feeling positive: I've had serious back problems for about six months now, during which my sciatica has pretty much dominated my life. It'll probably be at the very least another week before I can be sure it's having the effect I think it might be having. I've got a lot of very tired, very sore muscles that haven't had much exercise since before June.