[QUOTE=Lips_Obsession]
A lot of “thin” people have a misconception on how much overweight people eat. Now, granted, if the person is gaining weight, they’re eating more calories than they’re taking in. But “thin” people think that something along the following lines is true, much of the time:
Random “thin” person (A) weighs 150 lbs and takes in 1500 calories daily to maintain their weight.
Thus, random “fat” person (B) who weighs 300 lbs would need to take in 3000 calories daily just to maintain their weight.
The problem with this theory is that (B) has a much higher percentage of body-fat than (A), and thus a much larger percentage of their body weight uses very few calories to maintain itself (muscle burns more calories than fat, I believe it’s 9x but I’m not positive).
So, in reality person (B) may only need like 2200 calories to maintain their 300 lbs…
[/QUOTE]
Unfortunately that’s mostly (but not entirely) incorrect, Unless there’s a metabolic disease operating basal metabolic levels, even for largely sedentary people, are right at around 9-10 calories per lb of body weight per day. That’s right around the level it takes just to keep your body temperature to normal levels.
There is a metabolic offset in adjusting for obese vs non-obese basal metabolic levels, but it’s much smaller than you might think. Sans a metabolic dysfunction, to maintain 300 lbs, a “random” overweight person, even if sedentary, is typically going to have to be eating and or drinking 2900-3300 calories per day, whether they acknowledge it or not. And in terms of volume that’s necessarily not a big deal. One calorie dense junk food “snack” can easily exceed 1000 calories at a sitting.
The key element is time. Even if you eat (say) just one extra 300 calorie candy bar or bowl of cereal per day, beyond your daily burn rate, you will accumulate over 25-30 lbs of add. fat by the end of the year. That’s one candy bar over your normal burn rate.
You don’t have to be a gobbling hog to get fat. Lots of small calorie dense snacks over enough time can equal massive obesity.