No sure, but I have got quite good at remembering that weight does fluctuate massively due to fluid etc, and so not letting it bother me. Eg I'm doing reasonably on the diet at the moment. So if I weigh myself and find I've put on a pound but know full well I haven't eaten a surplus 3500 calories, then I remind myself it's not fat weight so I can forget about it. It's an achievement! Putting on weight after a week of dieting used to send me into total despair!