It’s been a while since I’ve actually contributed to my own blog (I usually just steal other people's stuff), so I thought maybe I would write something. That was two months ago. I haven’t had much to say in that time.

Anyway, I was having a conversation with a couple of my work buddies the other day. We were talking about exercise and food and health in general. One of the things that came up was the percentage of Americans who are obese. Paul said something to the effect of, “Aren’t 50% of Americans obese or something?” I felt like I had heard that too, “Something like that."
After clicking around on the Internet tonight, I found some websites with figures as low as 25% and one as high as 60%(!). The website that said 60% was clearly failing to distinguish between overweight and obese. But a majority of websites stated 60-65% are overweight and about half of those (30-34% of Americans) are obese. For some reason, that sounded about right to me.
But after thinking about it a little, why does that sound right? I recognize that there are certain communities where there is a higher percentage of obese people than others. But I can’t imagine 1 out of every 3 Americans is obese. I mean, we’re not talking about a little overweight. We’re talking about “excessively overweight,” says Princeton University’s online dictionary. “A medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health,” says Wikipedia.
And that just doesn’t sound right. What began to bother me was how vague the definitions of “obese” were. Very subjective to say the least. “Excessively overweight”? Over
what weight?
Well, upon more research, it’s not as subjective as I originally thought. According to Wikipedia, obesity is defined by BMI (body mass index), which is a number determined using a simple formula (your metric weight divided by the square of your metric height). Theoretically, BMI is an indicator of body fat percentage, said to be accurate within 4%. Once you’ve calculated your BMI, you only need to determine your placement on the following table. Simple and scientific.
BMI
less than 18.5 = underweight
18.5–24.9 = normal weight
25.0–29.9 = overweight
30.0–34.9 = class I obesity
35.0–39.9 = class II obesity
greater than 40.0 = class III obesity
Except, not really. First of all, it’s accurate within 4% (which is a scientifically unclear statement by the way). I’ll assume that the statement means plus or minus (+/-) 4%, which is what that statement usually means rather than +/- 2%, which is what that statement actually says. So even if my BMI is 22 (normal weight), I could actually be underweight (22-4=18), or I could actually be overweight (22+4=26). And that’s just stupid. And unhelpful. Moreover, the Index is also known to be inaccurate for people of certain body types, like pregnant women and bodybuilders. But where do you draw the line between bodybuilder and casual weightlifter (there's probably a pretty clear line between pregnant and not pregnant)? And if that’s not enough, some studies have shown that high BMI can have a more negative effect on Asians. So Japan sets the obesity bar at 25 BMI. China sets it at 28. And doesn't this sound a little arbitrary and subjective?
Anyway, I just wanted to say I have my doubts that one-third of all Americans are obese, at least not by a definition acceptable to most individuals. And as a whole, I think a lot of what we hear on a daily basis about health is hooey (more on that in another post).
By the way, the whole reason I decided to write this was because Onaona and I have been running a lot and I thought it would be interesting to buy a scale to see what effect the sudden influx of exercise might do. It’s one of those new scales, so in addition to weight, it measures body fat percentage using BMI (according to the manual). I guess it figures out my BMI and then converts that number into body fat percentage. Turns out, I have 20.4% body fat, which according to bodybuildingsecrets.com and the International Sports Sciences Association makes me obese. I decided it was time to investigate.
Labels: DG Original