Doesnât matter.
Only thing that matters is consistency; which is also true with the FTP tests; full or short, or ramps.
So next time you do The Grade, will you do any of it standing? If you stand both times, then it should be a fair judgement of abilities.
FTP is just a reference number, and in Zwiftâs case, really just to calculate power zones, and where to set the zones for workouts. It doesnât affect anything else (well, just your sprint animation).
Does standing while doing a workout invalidate the workout? Same concept.
We get your question; but this is just the answer in the real world. You can do these tests however you like; but the objective is to minimize differences when doing these tests, to be able to compare like for like.
ie: if youâve done ramp tests for the past forever sitting only, and did one with a standing effort to get the last bits out at the end, and it does manage to increase your FTP number, despite no other training going into it (and say, even doing a ramp test a day prior), then potentially you could âinvalidateâ it, but only due to inconsistency. HOWEVER, you should note that you were able to improve numbers by changing muscle groups, and learn from that, and use that knowledge to improve fitness.
Thereâs nothing wrong with standing, that isnât the issue; itâs consistency. If anything, people donât stand enough.
But, for the sake of that example, you can learn from âdoing it wrongâ according to someone somewhere who said standing âruinsâ a ramp test, that the reality is⌠you still did that effort; nobody else did. Will it make further workouts sting just a little bit more? Sure, but thatâs the whole purpose, is it not?
Closing note on this subject I always like to remind people to play with the workout bias mode when doing workouts.