Originally Posted by
globecanvas
Honestly I don't see a lot of value in testing FTP frequently. Even the 20 minute test is, as they say, "destructive" in that it costs a lot of energy/recovery resources that you could otherwise be using to train.
If specific work that used to be hard seems easier, bump up the target power until it seems as hard as it used to be.
I agree with WR in the sense that FTP testing won't be terribly taxing for the total week especially if done on a rest week. That and the value of knowing your FTP would be worth it.
How often are you testing FTP? Come build season, I would want my zones to be pretty accurate.