@hvac14400
I don't really know. At first I was still able to walk a fair distance (say30-40km/wk) but had severe PEM, chronic migraine and dysbiosis (the explosive runs) lots of muscular pain and lots of trouble thinking. I was roughly following the zone diet, so I was probably at about the same intake for about the first year, or at least on it on the days I was reasonably coherent.
I can remember being ravenously hungry and unsatisfied by eating, which has been a pretty common problem, and makes sense as I was not producing enough acid, bile or enzymes. At the time I was chewing vitamins and doing everything of what I could remember being advised to do ( which why I was walking myself into PEM - a physio had advised me to walk to sort out some back issues I was having.)
But I was also getting fecal pathology done and then taking antibiotics and then probiotics to try to get the microbiome sorted. I must have massively reduced my microbial diversity and that would have been part of the reason for the first increase in weight.
I know that in the last few years there have been extended times when I have been on very low cal intakes and not loosing much weight. A year ago I was on about 1600 KCal a day, a theoretical 1100 K cal deficit. But my auxiliary temperature was mostly around 35C/ I think it went down to 34.7 and up to 35.4 or thereabouts. I seemed to be at about maintenance according to my doctor. So metabolism has been an issue.
But the second increase in weight started with pizotifen, which stuffs up your response to hunger. You don't feel hungry for say 16hrs and then you are ravenous, so hungry it hurts and it does not stop when you eat but can continue for half a day and keep you up at night etc. If I had not had chronic migraine I don't imagine I would have ever taken it. But even on Pizotifen my weight increase was manageable I was still wearing the same jeans - though they had gone from loose to tight.
The real change came with another round of attempts to get my gut back to normal with antibiotics and changes in diet. Which was in retrospect a bit of a disaster weight wise and healthwise. My abilty to walk just fell apart and my weight ballooned.
It is a little hard to remember the chronology, but during this time issues with severe POTS meant that I could just barely walk to the service station to get a sausage roll or pie, or across the road to get yoghurt or cheese or salami and bread and vegetables, but I could not make it down to the supermarket for a better range of food, and had trouble standing long enough at the stove or bench to make a proper meal. In truth I had trouble standing long enough to make a sandwich. So my food quality went way down.
So maybe the initial dysbiosis, the things done to rectify that dysbiosis, the reduction in energy expenditure some migraine drugs, and the reduced ability to eat my normal whole food diet were to blame.
And I am not sure what it is, but I can still get into situations where the need to eat carrots or other essentially healthy foods is overpowering so I end up eating 3 kilos of carrots and 4 kilos of apples over the weekend (the weekend before last), or 16 kilos of oranges and some smaller but still ridiculous quantity of bananas in a week (November last year). I do not know if these are to do with dietary needs or stuff ups in regulatory systems.