Post of the month.
The hour to 20 minute correlation is excellent, but I think this coach will see the trend from the 40, and the following workouts, and pretty much nail it. In my opinion, I think the hour was made to see how much torture one can endure.
Haha, maybe the 60 min suggestion was made with the expectation that I'd reject it out of hand. Or that it would not be possible, for lack of a 60 min hill. Fortunately I am slow enough that I have all kinds of 60 min hills. Well, two at least.
I better stop yammering though, I have that little trainer ride to get on with.