Great thread. I too am interested in giving TTs a try. I actually have one in mind that's two weeks from now. I haven't really been training too much over the last couple months, and definitely not for a TT, but I figure it couldn't hurt to try. Plus it will be a good chance to race myself into shape Need to figure out the LT though. I'm guessing it's aroung 170. (does that sound too high?) Think I may have to tryout the Carmichael test and see how it goes.

Starfish, I totally understand your frustration with figuring out HR zones. Don't know for sure what my max HR is, though I think it's probably true that it varies with activity. Back when i used to run (last year) I got my HR up to 195. But since then on the bike I've only ever reached 187. Though i suppose it's next to impossible to ever reach one's true HRmax anyway, right? Maybe in a life or death situation...