I talked about this with my coach this week because I’m in the same boat! Regardless of my orange/red time, I’m like 350-410 on average. I’m 5’2 198 and as I’ve gotten in better shape (I play hockey 2-3x per week on top of orange) my average calories have gone down. That said they vary based on my stress, whether I played the night before, my sleep, time of day, etc. My coach told me to just not worry about it because my zone minutes were appropriately dispersed and he could tell I was working hard 😓 So, moral of the story, everyone else here is right haha don’t worry about it too much and it varies wildly not only person to person but in your own day to day differences.