I realize this might be a bit dense, but it is a good read for anyone wondering why they do not lose weight at the same rate when further reducing calories. Even as the subjects exercise metabolic rate is reduced with too much of a calorie restriction. It is a great read unless you fall asleep
https://drive.google.com/file/d/0B-63BdOXcERGcy16elhXLUtOenc/view?usp=sharing