The Mathematics of Obesity

Hugh Pickens writes "The NY Times reports that Carson C. Chow, an MIT-trained mathematician and physicist, has taken a new look at America's obesity epidemic and found that a food glut is behind America's weight problem, with the national obesity rate jumping from 20 percent to over 30 percent since 1970. 'Beginning in the 1970s, there was a change in national agricultural policy. Instead of the government paying farmers not to engage in full production, as was the practice, they were encouraged to grow as much food as they could,' says Chow. 'With such a huge food supply, food marketing got better and restaurants got cheaper. The low cost of food fueled the growth of the fast-food industry. If food were expensive, you couldn't have fast food.' Chow and mathematical physiologist Kevin Hall created a mathematical model of a human with hundreds of equations, boiled it down to one simple equation, and then plugged in all the variables — height, weight, food intake, exercise. The slimmed-down equation proved to be a useful platform for answering a host of questions. For example, huge variations in your daily food intake will not cause variations in weight, as long as your average food intake over a year is about the same. Unfortunately, another finding is that weight change, up or down, takes a very, very long time. Chow has posted an interactive version of the model on the web where people can plug in their information and learn how much they'll need to reduce their intake and increase their activity to lose."

Comments

Corn and Processed Grains

[Riggity]

Newsweek had a nice writeup about obesity and consumption of processed grains that pairs well with this story.

she arrived in New York in 1934 and was "startled" by the number of fat kids she saw - "really fat ones, not only in clinics, but on the streets and subways, and in schools." What makes Bruch's story relevant to the obesity problem today is that this was New York in the worst year of the Great Depression, an era of bread lines and soup kitchens, when 6 in 10 Americans were living in poverty. The conventional wisdom these days - promoted by government, obesity researchers, physicians, and probably your personal trainer as well - is that we get fat because we have too much to eat and not enough reasons to be physically active. But then why were the PC- and Big Mac - deprived Depression-era kids fat? How can we blame the obesity epidemic on gluttony and sloth if we easily find epidemics of obesity throughout the past century in populations that barely had food to survive and had to work hard to earn it?

From my personal experience, I recently lost a lot of weight. The biggest shift I made to burn off fat was to drastically reduce how much grain I consumed weekly. I exercised about the same amount during the time, but the weight loss tracked pretty closely to my change in diet.

Duh?

[argStyopa]

This is news?
When I was a kid, and McDonald's were few and far between (early 70s) a McDonald's "meal" was a hamburger, fries, and drink.

That's a single hamburger, what is now a small fries, and a small beverage. That was a satisfying full meal for an adult. Is that even a kids meal any more?

Another example, I believe it was mentioned by a poster on slashdot. He was remodeling a 100yr-old farmhouse and he hadn't planned to, but found he had to rip out the cabinets as they were too small - the only plates that fit in the cupboard were the 9" (small) dinner plates, not our today-common 12" dinner plates.

Finally, I was talking with a friend that runs a restaurant. I asked him why their portion sizes were so massive. His response was that it was to camouflage the prices with extra food, since food prices were cheap - it's the labor that drives costs. If he offered a moderately-sized meal, it might cost $8. If he was to DOUBLE the amount of food on that plate, it would cost perhaps +$1. Conversely, cutting the amount of food in half would only save $1. Consumers are far more willing to pay $9 for a GIANT pile of food (they feel they're getting a bargain), than $7 for 1/4 the food. On the latter, they feel they're being ripped off.

Re:It really isn't sugar, that is just one avenue

[merlinokos]

I am not declaring that working only forty hours or less is bad; but lets be honest those we know who do more tend to get further;

Science and reality both say you, and those whose viewpoints you represent are deluded.
Labor, experiments, and industry all agree that a 40-hour work week is better for everybody - individuals and companies. Productivity by people who regularly work more than 40 hours per week is lower than those who work 40 hours.
The only reason people get ahead for working longer hours is because a generation of managers appears to have been taught to think that bums in seats = productivity. So longer hours = increased likelihood of promotion. It's a vicious cycle that's fuelled by people like yourself who speak with no understanding of how the human mind and body work. As a matter of fact, /. posted an article on this very subject 2 months ago today.

Re:Get a copy of The China Study

[Anonymous Coward]

I'm living in China and I've lost a considerable amount of weight. It has little to do with diet. They eat substantially more fat and oil as a part of their diet than Americans do. But what they do do is exercise and a lot more of it. In the months I've been in China I've only ridden in an elevator one round trip. Not because I was avoiding them, but because I haven't seen them. My apartment up north required me to walk up and down 4 flights of stairs every time I left to go to work or really anywhere.

If I want to go somewhere, chances are good I have to walk.

What's more, the Chinese government provides free fitness equipment for people to use, and people do use it fairly regularly.

The suggestion that it's got something to do with diet is specious. They burn the calories they eat, and nothing more.

Re:Drugs

[Mindcontrolled]

Coming from Germany with its huge culture around sourdough bread I was shocked when I shopped for bread in a Californian supermarket for the first time. It was late already, I just came from the airport and I just wanted to grab something to make a sandwich. When I unpacked the stuff and took the first bite, it was... just horrible. When I studied the packaging, I learned that they obviously added a metric fuckton of molasses to the bread. What... the...??? The stuff was sweeter than some of the cakes I was used to.