Just finished the first 3 weeks of the Undulating Rotation (Meso 3/Week1, Meso 1/Week 1, Meso 2/Week 1) and I am beat!!!
Cathe advices that you should do one or two regular STS rotations (and be an advanced weight lifter) in order to move to an undulating rotation. Also, she noted that since this is a demanding rotation we should move the leg workout mid-week for all mesocycles to give our upper body more rest time (I have been feeling overworked the past 3 weeks and Cathe's advice was dead-on!!!)
Cathe posted the October 2009 rotation which is undulating STS. If I hadn't started the full 3-month STS undulation already, I would start Cathe's. Might do that in a couple of months.
I can't believe how versatile STS is! Definitely the best investment I've made for my health and fitness!
Chris.
P.S. What makes the undulating rotation fun for me is that I get to do pushups only once every three weeks!!! But I get to bench-press more frequently!!!