Originally Posted by
gregf83
What are you planning to do with the FTP number you get? If it's just for setting your training zones either method will get you in the ballpark. After that you can adjust the power for interval efforts based on how easy or difficult it is to complete a given workout. If the workout is too easy, raise your target.
Knowing a precise FTP is really only necessary for pacing one hour TT race efforts.
Exactly. This is the important stuff. FTP is not for its own sake, but for training programs.