When I pay attention, I can tell that I may sometimes move less and be less energetic during the day when in a deficit. It’s just one of the signs…this is probably why my last cut was so effective because not only was I diligent in not snacking - I also added a good amount of walking into the day to keep my activity to compensate for less NEAT.
I’d be curious to hear about the approach your dietician is helping you take and what your goals are if you wouldn’t mind sharing. A good place to share it would be on this thread if you are so inclined. Weight loss accountability buddy or thread discussion