zacster,
Thanks for the advice.
The computer for sake of battery life makes a lot of sense. I have to carry a battery charger with me on workouts >1 hour to keep phone charged (old phone = poor battery).
I haven't figured out the calculated power part of it yet, but I did use strava outdoors for the first time. Initially the apple watch didn't work. I realized I have to initiate the workout on the strava app on the watch, rather than via the phone. The other sensors did pop up intuitively.