So I left you with this weird kind of epiphany that I was the obese size 4 person. I was small but I was, for lack of a better way of saying it, soft. My body doesn't distribute fat well at all. Much like my father, I have what I like to call chicken legs. It doesn't matter how big or small I am, my legs don't change-- they are sticks. Same with my arms. And so you take out those key pieces of real estate and I have very few places to store fat-- my torso is the main one and my face and neck a little less-- but enough that when I lose weight people always comment on my face-- my jawline being more prominant, etc.
Belly fat is scary fat. It didn't used to be. Our bodies evolved to store fat in our bellies because it protected our vital organs against exposure to the cold-- so back before we had central heating and good lighting to all those long dark winter nights when freezing to death was a real concern for human survival. (think back to cave times... we'll be talking alot about cave times in this blog, rest assured.) So imagine a gorgeous summer day-- everywhere you look in the hours of abundant sunlight are plants and vegetables that are sources of carbohydrate (you know... the real carbs... not the bread carbs that came much later in human evolution). Summer is all about carbohydrates-- fruits and vegetables are abundant. And carbohydrates do two things for you-- one, they get converted into 'right now' energy and whatever else gets stored in body fat-- around your vital organs in your core. See, the body evolved to do that because when carbs are plentiful-- its summer time... which means that the cold of winter is just around the corner and you need every bit of help you can get. (Interesting side note about all this evolutionary stuff... your body also evolved to get cholesterol... that artery clogging stuff, because it fuels your heart and can keep your blood warm and flowing throughout the winter and patch your arteries any time of the year if you "spring a leak." But come spring time you are supposed to be pretty much depleted of cholesterol from the long cold winter.)
Some people distribute fat a little better than others-- storing deposits in their legs, their butt, their arms, etc. and the point is still the same-- its a reserve your body evolved to call on during the harsh conditions when food wasn't available. And now we don't have to contend with that lack of food and harsh cold. So we never have a period of utilizing that fat store for survival. In the grand scheme of things the evolution of not needing to protect ourselves against the harsh winter is infinitesimally short in comparison to how long we did need it. Homo sapiens first showed up as the new kid in town approximately 250,000 years ago, the first real evidence of a hearth fire some 125,000 years ago and the lightbulb in 1879 (130 years ago). All this is to say that the whole protection from the elements and abundance we expect now isn't in our DNA. And our DNA has not changed since homo sapiens came along. We got the same stuff going on that our cave-dwelling brethren did some 250,000 years back.
So we evolved to need fat. And cholesterol. But we only had exposure to it during one season and the storage was to fuel life for the remaining 3. We've kind of fallen off that bit.
So now let's think about today's food choices-- and what better a place to look than the trust food pyramid that the US Department of Agriculture puts out. Here... we need a fun graphic.

(Quick jarring leap forward in time-- there is the whole weirdness about conflicts of interest with that funny pyramid thing. Who here is a lawyer? Doesn't it seem weird that the US Department of Agriculture is telling you to eat more grains? Of course they want you to eat more grains-- they're marketing their wares. But let's not go there for now...)
It gets interesting when you start comparing the amount of carbs people take in as a result of that emergence of agriculture. Just for fun I pulled out some interesting comparisons-- on the order of number of carbs per 100 grams of food:
brussels sprouts: 8.95 grams
carrots: 9.58 grams
mushrooms: 3.42 grams
apples: 13.81 grams
figs: 19.18 grams
you get the point. Now let's look at the same measure for grain-based food:
whole grain wheat flour: 71.58 grams
corn: 74.26 grams
long grain brown rice 77:24 grams
so here's my point-- I'm not a big "don't eat carbs" person and often find myself quietly laughing at the irony of Dr. Atkins himself dying of the impact of his own diet, but at the same time, there's a startling differential there. When agriculture came along a fundamental balance shifted such that we are absorbing more carbs faster than ever. And if you follow the wisdom of the food guide, you are eating 6-11 servings of that stuff. Which, as I mentioned earlier, evolved to be used for short term energy and then stored for the long haul. It's dense and sciency and all, but you can get a decent overview and details on wikipedia if you want to understand it a little more.
My point here is this-- we are, metabolicly speaking, the same as we were the day some 250,000 years ago when a switch was thrown that made homo sapiens emerge. We still employ all the strategies that got her through survival and haven't really adapted to this abundance we have right now. Our bodies either need to catch up or we need to start aligning our food with what helped us evolve and survive in the first place.
Ultimately, I chose the later. The results of that decision have been powerful. And therein lies a large part of the journey.
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