After waking up I was reading my morning report in bed and before it was closed I switched on my watch to the Strength training activity to preview the suggested Circuit training workout.
I started the workout only for previewing the exercises and after a few minutes I stopped the workout without saving it.
Then I looked in the Connect app for my sleep stats, but it was empty. Obviously, I had to close the morning report first before the data was visible in Connect.In Focus.
I switched the view to Body Battery and saw a sudden drain in it with 13 points, just during the previewing, as if I had done the exercises also physically!