I actually got a video and found it really helped my back also. I'm not doing it lately as I lent it to my mum, who is struggling after 4 C sections to do even mimor sit ups as the muscle just isn't there - but she's working on it.
I did quite enjoy it though. I still get stomach work out on my bike (cycling outdoors works many more muscles than just your legs and it has toned my arms no end)
35kg lost. (November 2005 - October 2006)
15kg gained again (as at October 2010).
Back to the drawing board - Let's do this thing!
"You can't change the winds, but you can change the sails"
"Reach out and take control of what lands in your lap"