Zwift power filtering

I dont understand the filtered/unfiltered part of zwift power. Im usually in the unfiltered part. Why?. Do i have to register each race before i start.

Appearing in unfiltered usually means that you didn’t meet one of the requirements for the race. For example, no heart rate monitor or to high power for too long for the race category. The letters on the left indicate the reason.

By the way, the requirements for each race vary - they’re set by the race organisers.

Imteresting. My hrm doesnt always register. Thats probably why. I need to find out why.

That would show as “HR” next to your results.

You’d only be in the unfiltered section for the lack of HR data if the organiser made HR data mandatory, which it isn’t always.