Huge Fitness Sig Changes from One Ride? Inaccurate?

[idefix (Idefix Little-Dog)]

I don’t think the algorithm gets lots of valuable information when you do some easy stuff after the BT. I think what’s important is to not simply stop pedaling right when you feel like you can’t hold the power any more but to actually ‘fail’ as in drop the power naturally. And maybe try again to push a bit more and fail again.

Like @wescaine described here:

Help with Fitness Test for Breakthroughs Version 2?

Think you’ve hinted at it in the end of your post - best to do BT efforts in slope mode so you can actually breakthrough ‘fully’. If it’s been a long time since a BT that’s especially important (slightly annoying if auto mode finishes an interval when you have something left in the tank). It may be worth increasing the intensity a few percent (or more) as well, given its been a while. In the end, what’s important is that you go to failure after drawing down MPA. When you think you’ve got nothin…

I’m going to try that next time, when I’m fresh and motivated enough, the last one doesn’t happen too often for me