On trainingpeaks virtual. increased grade for heavy cyclists makes you travel at 1.0 MPH. Doing charity rides for distance.
Grade calculation/adjustment: 150 FTP and 130kg means riding at 1.0mph uphill. I'm riding for charity attempting to accumulate miles indoors and out. Hard to ride indoors when elevation causes me to ride 1.0 mph. Don't have 300 hours to ride in a month.

Many thanks for your suggestion and support for TrainingPeaks Virtual.
For better, or for worse, TrainingPeaks Virtual uses an accurate physics model for the movement of bicycles in the application. This means that your speed indoors will match your speed outdoors, and on steep inclines that means going slowly.
If you want to accumulate virtual miles, then we strongly recommend riding on the flatter areas of the island. For example, the "Forest Velodrome" route is perfectly flat with no hills at all, and the "Coastal Loop" route is mostly flat. You can also sort all the routes in-app using the filters at the top of the "Ride" tab of the main menu, to show them in order of their average gradient so you can easily see which routes to pick!