I just typed undulating into the search box and found these:
http://www.thecathenation.com/forum/showthread.php?t=268447&highlight=undulating
http://www.thecathenation.com/forum/showthread.php?t=265294&highlight=undulating
These are just a few threads....hope it helps though...
Laura
Ok, I uploaded it for sharing in the workout manager and it's showing up in newest rotations under Cathy's Undulating Rotation. See if that helps you.