Quite a lot of people know that I do not eat two days in a row and fast for days at a time while exercising for hours every day and haven't ate two days in a row for a good 15 months now. What I have learned during this time is that my scale weight lags how I actually ate from one section to another quite a bit despite my food days gaining too much weight from water bloat on just about every food day and a subsequent water weight drop upon the first fasting day that results in a scale weight drop roughly of half of what I gained regardless of having stools or not.
I have long contended that when the body takes in food chemicals it over hydrates which then causes far more scale weight gain than can be explained by calorie intake or even the total weight of the food that was eaten. Also I have contended that when the body drops out food chemicals the chemicals over dehydrates the body even when one drinks more than an ample amount of water which then causes to all sorts of dehydration problems which go away after fasting a day and a half or two so those effects aren't from dehydration or starvation that early into a fast but from dehydration and drying out and off of food chemicals the same as would be the case of a drunk drying out from alcohol. Restricting a bit before fasting therefore makes fasting easier, and so does eating less chemically laden healthier foods and shying away from sugar and sugar substitutes as sugar crashes energy after spiking it. The sugar effect is magnified upon an empty stomach after fasting so food days between fasting periods aught to avoid its intake as much as possible.
Anyways, I have also learned through personal experience that when I try to maintain weight by selecting a set maintenance weight to which I generally take a food day when my morning weigh in weight drops below it and take a fasting day when its at or above that the weight I tried to maintain at suddenly is a bit off from current weight. Recently I was maintaining at a set weight of 131 lbs. and thought I would test out lowering the set weight downwards to 130 lbs. though I mainly kept to the 131 set weight for the most part. Then suddenly my weight dropped and was regularly clear down to 128.5 lbs. which was way too low as all my ribs suddenly jutted out all over the place. I then decided to shorten the days between fasts and up my weight back to the 131 lbs. set weight but when I did that I then suddenly found that I overshot by quite a bit. It seemed like my actual weight loss/gain lagged whatever the scale weight read on an after food day basis by up to two full food and fasting day periods.
So what exactly is the Whoosh Effect (a concept that is contended by many as being real):