Well, the math sort of shows it but there is honestly a lot of assuming with that. Calories in versus calories out. The calories burned via all that walking plus what a person normally burns in my daily activities should be X. The amount of calories I consume would have to be higher than that to keep adding weight. I have not been tracking religiously but I have ballparked it often and I should not have been putting on weight.
But the following is 100% true: alcohol, lack of sleep, lack of exercise, stress, diet, and age can all lower your metabolism. So the diet is part of it but not the whole story. I cannot really exercise outside of the 3-5 miles per day walking because of my muscular disease. I need to get back to biking and swimming , but I can’t lift much weights and many activities hurt and/or are detrimental.