I've heard this figure thrown around a bit and I'm having trouble wrapping my mind around it. The idea is that a human just sitting around like I am now gives off about 100W of power. I'm eating a pack of fruit snacks now, worth about 190 Calories. So, a quick calculation... 4.12J/s = 1 cal/s; 100J/s ~= 25cal/s; 1000 cal = 1 Cal => 1 Cal/40s; Under a minute to burn a Calorie. A day has over 1200 minutes, so you end up burning let's say 1800 Calories. Is this where the "2000 Calorie Diet" that you see on food packaging comes from? They just assume you're a lazy *** and don't move at all? Or is 100W just way too simplified?