When you select a workout or meditation on the Fitness app on Apple TV, you can see all the information you need to prepare for your workout.
Once you start the workout, you can view real-time metrics onscreen and control playback in several ways.
Note: Apple Fitness+ workouts require a Show playback controls, then do any of the following:
to turn on Picture in Picture viewing.
The currently playing workout or meditation moves to a small viewer in the lower-right corner of the screen. In the main area of the screen, Connect your Apple Watch or iPhone to the Fitness app on Apple TV