I'm injured and can't run, and I'm not sure about road riding either so I've been riding the Virginia section of the Blue Ridge Parkway via the GPS course upload option on the Tacx training desktop app on Windows. The first few rides uploaded and gave me values for training stress score and intensity factor. Then after august 20 I don't get those metrics but still get average power, 20 minute power, etc. As far as I know I didn't change anything on the app, using the same computer, same heart rate sensor.