I found one of the graphs in this video to be quite succinct, and probably accurately describes what is going on with many of us. Start at the 29:35 mark, and watch for at least a couple minutes. He describes the deep hole many of his patients find themselves in, and describes later in the video how he gets them out of this hole (it ain't easy). The entire talk is fairly technical, but this graph at the 29:35 mark is pretty simple to understand. --- I'd be most interested in any comments.