Since the beginning of 2024 I've been increasingly using the Rouvy app in my indoor bike training (see Indoor Training - Part 3 Rouvy vs Zwift and Fulgaz). Until the other day I'd only been using this to enliven my indoor cycling on otherwise very dull interval sessions, but I thought I ought to give Rouvy's workouts a bit of a try. And I'm rather impressed.
The Rouvy website has a very clear description of how this all works. So I needn't offer more than a few comments, based largely on using Rouvy on the AppleTV.