I grew up thin and lanky, though not necessarily fit. The former was a result of genetics, the latter would have required exercise and physical activity when I preferred reading books and playing video games.
I weighed a svelte 165 lbs when I enlisted with the Air Force in December 2002. Though Basic Training was intensive on the exercise front, the regular, active duty force had no mandated PT program so long as you could pass the stationary-bike test once a year.
No mandated exercise, four free meals a day, and a slowing metabolism soon started showing. Even the introduction of a new PT test wasn't enough to make exercise appealing to me. I got by with the minimum amount of participation, and never developed any sort of regular exercise regimen. I have, by fits and starts, tried to instill my own exercise habit, but it never takes. So here I sit in front of a computer—with a Mountain Dew and a depleted bowl of Peanut Butter M&M's at hand—lamenting my excess weight and lack of fitness.
I've tried to watch what I eat by using the Lose It app for iPhone and iPad, but I forget to log foods all the time, and if something doesn't have a barcode, it's much more difficult to log what I've eaten. Then, of course, there's the issue of predominantly eating foods that come with a barcode.
Today I weigh somewhere in the realm of 240 lbs. I eat too cavalierly and I don't exercise, it's as simple as that. Maybe I'll find it within myself to change. I have a goal of not being fat when I go to the Star Trek convention in August 2016. Let's shoot for that.