Strength exercise routines not using any 'active' calories

I have recently rejoined Fitness+ and have noticed that Strength routines don't contribute any 'active' KCal to the fitness ring. The other routines I use (Core) work fine. Some examples are below.

I am using an Apple TV (4th generation) running tvOS 26.0.1

Any suggestions on how to resolve this?

[Edited by Moderator]