No, it's not. We are using only endurance workouts for this rotation. Look at the August 2009 rotation. I consider that an undulating rotation, since you are switching the lifting style each week. I did it 2 months in a row, and I used Meso 2 and Meso 3 along with endurance workouts like PH and ME in month 2. Cathe's October rotation is also an undulating rotation.