I neglected to mention in the thread started by (Ade Merckx) that I have found it best to run the HOP workouts as a progression -- in other words, the PE stays about the same but the watt level increases each month as FTP improves -- for instance, did my first serious HOP workout yesterday since my tendon surgery July, 2008 and January I am genrally looking to do 310W+, Feb. 320W+, and March 330W+.
The HOP serves to pull together a lot of good FTP training but also serves as a very useful barometer as to just where one's fitness is. I learned yesterday that having the fuller use of my right leg (due to tendon repair) is a very good thing but my aerobic power has some catching up to do still.
Best,
Bill Black