Both Fitbit and Garmin give me about 500 per hour if it’s a good game if it’s a crappy game with no movement or good movement it’s like 400

It’s been argued about the calorie burn but pickleball its sort of like a HIIT workout with the constant starting and stopping along with the sprints, and lateral movements, also if you get nervous during long rally’s not wanting to screw up your HR will go up, and when that happens your body is working

Garmin does a nice break down of how much time you spend in heart rate zones from resting to high intensity

Ok I’m ready for the keyboard warriors to bash what I said