A colleague of Sharon Butler's has a book out with similar type of movements for body stiffness, restrictions, adhesions.. I just placed a request for the book in my local library.

Some online info-
http://www.undulationexercise.com/
some vid clips- http://www.undulationexercise.com/exercises.htm
[Excerpted from
"Relieve Stiffness and Feel Young Again with Undulation"
By Anita Boser, LMP, CHP]