As of now, it seems like we have two commonly asked questions.
Q: Can I push my custom workout my head unit to be completed outside?
A: Here is the answer directly from Nate:
Q: Why can’t I push the exact indoor workout to my head unit? Sometimes it changes the name and intervals slightly.
A. We have exact outdoor versions for each interval workout that is part of a TrainerRoad training plan, and we are working on bringing this capability to all of our workouts. The problem is that we have to rebuild them into a format that can be sent to both Garmin and Wahoo head units, and that requires some manual rebuilding. And since we have so many workouts, this takes some time.
In the meantime, we have one-to-many relationships with all of the remaining of the workouts, which allows you to complete a similar (but not identical) workout outside that targets the same energy system as the planned indoor ride.
Also worth mentioning is that endurance workouts will always have a one-to-many relationship since the interval structure does not differ much between workouts. They are mostly focused on duration, so there is no need to build one-to-one relationships for each and every endurance workout.
I hope this helps clear things up a bit!