Originally Posted by gregf83

Yes, it averages exactly the way I'm thinking based on simple math.

Of course you can do higher efforts for shorter periods but there are reasonably well established boundaries for power over a particular time relative to FTP. My only point is that most people can't maintain 116% of their FTP for 20min. If you can you've probably underestimated your FTP.

Your examples of 1' and 5" power are irrelevant to the point I was making.