Cross training question: The gym here has a Concept 2 rowing machine which can display wattage. I'm going to assume that it's fairly accurate -- if only because a rower would be similarly power obsessed as a cyclist.
I'm thinking I ought to shoot for a number that's a bit higher than what I'd do on my bike since I'm using my whole body rather than just my lower half. How much higher? 25%? 50%?
Or maybe just go by perceived effort until I get a feel for what's hard/easy/sustainable/interval....?