90 days window on cat

Just curious on how the 90 day window works if < 3 races, since I don’t race often. What happens if you only have 2 races in the past 90 days?

It looks like ZP pulled in my best non-race within the past 90 days when my last race dropped out of the 90 day window; is that right? What would happen, say, if there was a short race where there is only 10min data? My profile is here: Zwift Power - Login

Thanks!

ZP calculates on the “events”, not just races.

Its the 20min avg * 95% that’s counted, so 10min data is irrelevant.