Originally Posted by
Dunbar
25w distribution from an interval session vs an easy ride. It should be pretty clear from looking at the two I'm not grossly overestimating my FTP.
The only time I look at the 25W distribution is to see if I was training in mostly in Z2 specifically. Like for a 3 hour ride I'll view the distribution to see if I was staying within the zone or going all over the place. Its pretty useless otherwise unless someone here wants to enlighten me.
If you can do 2x20's at your FTP then I'd say your FTP is spot on. If not, then I think you might want to throttle it down or up as necessary.
A friend of mine did the lab test to determine his FTP. He backed it up with a 20' to verify the accuracy.