Originally Posted by
Dunbar
Sorry mate, but I think you're wrong. Anyone who can push 300 watts (120% of FTP) for 12 minutes continuously does not have an FTP of 250. Especially if they can do it back to back during an interval session. The first interval I averaged 283w, the second one I averaged 275w. Even using conservative estimates I'd be at 250-260w which means I'm not grossly overestimating FTP. I have access to a lot more of my power data than just these two rides. Normalized power over the course of the ride where I am is useless for determining FTP.
In any event none of this explains why I'm getting winded riding at 100w+ less than these numbers. But I guess we're well past that point...
Do a 20' test bro you'll get the right number. Don't worry so much about getting winded. It could also be a sign of not enough miles in your legs and you're not used to it. WHen I had a low base last year, I would get winded from easy rides.