Here’s one way.
- Click on the day you did the workout.
- Ride
- Make sure the category is ‘Workout’ (for me that is default anyway)
- In a format like this (see workout builder for more)
-1h5m 200wput in the duration and avg watts. This should populate the duration and load fields - put the category to ‘Manual Activity’. It will keep the duration and load fields
- fill in the rest and hit OK
Hope that works for you