[nik-]

This is a question I have about calorie limiting.

Lets say my BMR is 2100. To lose a pound a week, my calorie deficit needs to be 3500 a week which puts me at 1600 a day.

If I eat 1600 calories a day, and burn 500 via walking and exercise (bringing my total net to 1100, way lower than the number), does my body consider that starving? Or is it kosher because I still ate a reasonable amount of calories? What if I have a really active day and burn 1000 calories and still eat that 1600, does my body punish me for this?

TLDR: Does the body do this shutdown based on total calories minus exercise or calories eaten.