Extreme obesity

I have been thinking that it's one thing to reach a goal weight and then back fown, but something else entirely different to keep a big body running smoothly for a long time. For those who are doing it, How do you maintain your health and liveliness?

I was fat at kindergarten, at school I was obese, in college I was morbidly obese and now I am supersized, doing well.

Let's put it this way. I found my memory box last month, in it was my tshirt from year 6 at primary school that got signed/ drawn on last day of term (August birthday so I would've been 10- 22 almost 23 now). I can still get it on, albeit snug, but it goes on. I'm 330 ish now so yeah I was a FAT kid in primary school even