The Stryd Mobile app will allow you to exclude a run from your Stryd profile (auto-calculated Critical Power calculation, RSB, My Training chart, Race Power Calculator). The option to exclude runs is not yet available in PowerCenter.
Please follow these steps on iOS:
Open up the Stryd Mobile App
Head to the Calendar
Click on the run card you wish to exclude
In the upper righthand corner, select "..."
Select "View Details"
Unselect "Include Run in Analysis"
For Android, please follow these steps:
Open up the Stryd Mobile App
Head to the Calendar
Navigate to the run you wish to exclude
On the top right, select the contextual menu " ⋮ "
Select View Details
Scroll all the way down and unselect "Include Run in Analysis"