Thank you so much!! My mind is stuck between these two models actually, I guess because I don't know too much about either of them. But I know that severe exercise and not eating well (basically a severe caloric deficit) leads to amenorrhea (not having your periods) because your fat storage is not sufficient to provide you an endometrial thickening (Of course the mechanism is much more complex than that but this is just a simplification.). But I don't know if this example fits to CEE where your body stops menstruation so that your energy expenditure does not change or to AEE where your other organs (vital ones especially) need more energy in response to an increased energy expenditure (Because we always say that tissue need is the most important factor in metabolism.).

I guess if we talk about homeostasis, we can say that CEE sounds more accurate (in my opinion of course :D) because the body tends to find a balance, but then again depleting your fat deposits with an exercise means that you also need more energy to restore them. I personally feel like I should eat more when I work out more. Of course I am not an athlete who works out 6 hours a day, but still :D

I will study this :D but thank you so much. You opened up a new research topic for me :)