Hello,
I am 35 years old, and have tried intermittent fast, not in an intentional way, many times because of the requirements of my job. I have realized that when I am in those situations I tend to eat very much after the fasting period, and of course I have gain weight. I haven't search for some more deep info on it, but maybe I could share with you some tricks that have worked for me. I will try not to be so long.
I was reading some ago that eating and breathing are the essential elements that keep us alive, and how we do that is a copy of what is happening in our mind. If I feel that I don't deserve life, not consciously, even though I eat, my body will not extract the nutrients of the food, or if I feel that there's some emptiness in me, not consciously, I will try to fill it with anything, a car, expensive cloths, or eating.
I am not a physiologist, and I am not trying to judge anybody, but I can tell you from my personal history, that until I could stop that anxiety, I could improve my health, reduce my blood pressure and lose weight.
So what I'm talking is that your should look into yourself, and find what is that stress you. For me, was money, job, car traffic, etc., but there was a deeper reason, that was hidden, or that I didn't want to think or remember about.
I am the youngest of my five brothers, and I thought that I had to compete with them for the love of my parents. These lead me to be in a mood of always competing, always stressed out, and I though I that was not the better one, I got down, and I started to eat bad, and gaining weight.
So what was the solution for me? I started asking powerful questions to myself, like Do I really need to compete for the love of my parents? and the answer was NO. I realize I have their love and the one from my brothers, so suddenly that anxiety banished. Then I could enjoy more my life, the time with my loved ones, my job, my time alone, of course, and of course the FOOD. After that started losing weight, my blood pressure was more normal.
And of course this was just one nail stuck in me, I know that I have a lot. Hahahaha.
Then, my recommendation is: go deep in yourself to look what is making you gain weight, complement it with some time for yourself, some walking around.
I hope, this could help you.
All the best.
David