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Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

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August 27, 2007

300 Pound Triathletes? Obesity Gets an Overhaul.

By Mark Sisson
30 Comments

The latest battle in the fat wars: obese triathletes. A burgeoning movement these days, casually known as “fat but fit”, promotes the acceptance of obesity in sport. Just as we’ve known for years that overweight individuals can have low LDL cholesterol and blood pressure, the thinking goes that obese folks can be fit and healthy despite being, well, enormous. I’m going to restrain myself on the triathlon commentary (for now) but I do want to discuss the general issue here.

The movement lends itself to a larger debate over the alleged risks of obesity. For decades it was simply accepted wisdom that obesity meant increased risk for illness and disease across the board. CHD (coronary heart disease), type 2 diabetes, arthritis, depression, cancer, you name it, and obesity was likely to increase the chance you’d get it. And the wisdom was well vetted by literally thousands of peer-reviewed studies. The only thing obesity didn’t do was raise a person’s osteoporosis risk (carry around a lot of weight, and your bones are going to respond out of necessity).

Enter the counter arguments and the acceptance police. No one ever questioned the fact that obesity – even being slightly overweight – is flat-out bad for your health. Until Katherine Flegal, that is. Flegal is a CDC researcher who found that the statistics were actually bearing out an unlikely conclusion: being a little bit fat is better than being lean. Journalists and authors quickly published a slew of writing questioning the reigning fat hypothesis. Conspiracy theories followed in short order (of course doctors and drug makers would fuel the obesity-is-risky hype: there’s money to be made). Americans alone spend $33 billion a year on weight loss, and the number continues to increase (one reliable estimate that includes healthcare-related costs is triple that number). Obesity, so the debunkers claim, is pure myth manufacturing. Two-thirds of Americans aren’t obese; it doesn’t kill 400,000+ people a year; it doesn’t shorten your lifespan. And on and on.

There’s a great deal of romance here: just enjoy life and savor food, and the problem will take care of itself. We worry too much about calories. Americans are extremists – we hate carbs, then we hate fat, then we hate carbs again. Look at those French, enjoying their cheese and wine and croissants and managing to be trim – we could learn a thing or two. You could even make a rather persuasive “primal health” argument that obesity would be smarter in an evolutionary sense, since your body would have readily available fat stores with which to survive shortages or famine. Romantic and catching ideas, to be sure, but that’s the problem: no scientific studies bear any of this stuff out. Beyond that, the counter-evidence is lousy. For example, some of the lean folks in Flegal’s study were smokers and/or chronically ill. And in fact, a leading researcher points out that the “overweight people are healthier” case has been recycled several times in recent decades.

Good headlines, wobbly science (and the French are dealing with an obesity problem, too). The facts remain: both obesity and being moderately overweight are unhealthy.

That said, how do we define obesity? I think that’s a major issue we’ve got to address. Admittedly, the BMI is a near-useless metric. It can’t account for bone density, lean muscle mass, individual physique, or adiposity (fat). You can be rail-thin but in terrible shape, and get a clean bill of health if you go by the BMI. Likewise, you can have a bigger build, but be maintaining a very low body fat percentage, and you’re gonna get classified as obese.

Obesity is a problem, but so is the way we define it.

Further reading:

The Busy Person’s Guide to Losing Weight

Top 10 Health Scams

Why the Atkins Diet Works

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TAGS:  body fat

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30 Comments on "300 Pound Triathletes? Obesity Gets an Overhaul."

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Moe
Moe
9 years 30 days ago

Hey, at least we’re well rounded!

Ok, silly puns aside. I have a question. Are BMI scales standardized globally or from nation to nation. Would my BMI change in, say, China?

McFly
McFly
9 years 30 days ago

Moe, you bring up a good point. Even if the BMI is the same across countries, the methods of gathering data can vary widely (i.e. unreliable statistic) or is it one group of scientists accurately measuring the entire world?

Sara
9 years 30 days ago

It’s not globally standardized. Remember we use different measurements, too (kilos vs. pounds, cm vs. inches, etc.).

Sonagi
Sonagi
9 years 30 days ago
I don’t think we need to define obesity. I think we need to promote healthy diets and exercise. On Yahoo News, I read a story about a community in Germany that is providing cooking classes to low-income families to teach them how to cook nutritious meals with whole foods on a budget. That is what we need desperately in this country. People don’t know how to cook simple yet healthy meals and mistakenly believe that healthy food is unaffordable. Last year I checked out from the local library “The Obesity Myth” by Paul something. The book had two themes: 1)… Read more »
Brian
Brian
9 years 30 days ago

At the risk of sounding like a broken record — down with the BMI.

I know I’m healthy, and I feel better having stopped worrying about having a beer or some wine, or horror of horrors an occasional cigar. I look at my grandparents, they always took care of themselves, but every afternoon like clock work was coffee and pastries, but they were happy, healthy and not overweight. They lived to be 98 and 100, if I can be so lucky…

Crystal
Crystal
9 years 30 days ago

Good points Sonagi.

The first thing that came to my mind was if you can’t beat em, join em. People are throwing up their hands. Well, some people…

BTW, it’s not just our athletes, our military is growing(wide).

Crystal
Crystal
9 years 30 days ago

Brian, I don’t know what my BMI is and I don’t care. I own a mirror…

Caloi Rider
9 years 30 days ago

Okay, forgive my ignorance here, but what’s the problem with using bodyfat percentages as a measurement? It’s a lot more revealing than the stupid BMI scale. Granted, it’s tough to determine how much of that is visceral fat and how much is subcutaneous, but don’t those two usually increase proportionately anyway?

maurile
maurile
9 years 30 days ago

Obese people have indeed become more accepted in sports recently. LaDainian Tomlinson, for example, won the Male Athlete of the Year award at the ESPY’s in 2006 — and his BMI of 32 makes him obese.

Pelikan
Pelikan
9 years 30 days ago
The BMI is counted the same way regardless of country: weight in kilograms divided by the squared length in meters: I weigh 68 kg and am 1.76 m tall. That gives me a BMI of 68 / (1.76*1.76) = 22. Since I eat fruits and vegetables and take the bike to work, I believe I am on the safe side. BMI maybe isn’t an excellent tool, but it is ok. It is (probably) better to be a bit overweight, but eating greens and working out, than being a normal weighted couch potato. But it must be beyond doubt that a… Read more »
maurile
maurile
9 years 30 days ago
Pelikan, many of the healthiest, most athletic people in the world are overweight or obese according to BMI. I mentioned LaDainian Tomlinson in my previous comment: he has a bodyfat percentage of 6%, but is obese according to BMI. Take a look at him in this picture and see if you think that it is “not possible to have a healthy lifestyle and weight that much.” Tomlinson is the one in the middle: Shawne Merriman, with 11% bodyfat, has a BMI of 33. Does he look obese to you? The fact is that any males with even moderate amounts of… Read more »
maurile
maurile
9 years 30 days ago

The images I tried to post above didn’t work. Here are the links:

LaDainian Tomlinson
Shawne Merriman

Sara
9 years 30 days ago

Great points, Sonagi. Thanks for taking the time to write that. Do you have a link by any chance to the other graphic? We should switch it out/add it to the post. Or at least include the link.

Morning everyone! 😉

Sara
9 years 30 days ago

BTW…my great grandfather lived to be 104, though he claimed he was 108. Everyone was too scared of him to disagree 😉 He was definitely a greasy breakfast and coffee kinda man. I think a lot of longevity has to do with your constitution as well as the lifestyle choices you make.

Mark
9 years 30 days ago

Maurile – your comment gets to the center of the problem with the BMI. Body fat is a much more relevant and critical health measurement.

Mark
Mark
9 years 30 days ago

…but the big problem with body fat measurement is that it is very difficult to get an accurate and standardized reading. The two best methods are hydrostatic weighing and dual x-ray absorptiometry (DXA) and both are expensive and time-consuming. Those Tanita scales are way off many times. One of the cheapest and reasonably accurate tests is the one done with calipers by your health club trainer. When all is said and done, you know by pinching yourself whether or not your need to take action

maurile
maurile
9 years 30 days ago

It used to be difficult to get an accurate body fat percentage. But these calipers available for $20 are generally within 1.1% of the results from under water body weighing, and can be used to self-administer a body fat test very quickly and easily.

maurile
maurile
9 years 30 days ago

It used to be difficult to obtain an accurate reading of body fat percentage. But these calipers are cheap and easy to use (with no partner needed), and give results generally within 1.1% of those from an underwater body weighing.

Jennifer Lin
9 years 30 days ago

never base your health by the bmi…
so inaccurate and taking so little into account when calculating your “health”.
my philosophy for staying healthy?
simple: exercise regularly, eat fruits and veggies, stay away from fatty fried foods and desserts!

Sonagi
Sonagi
9 years 29 days ago
Here’s the link, Sara, courtesy of the Global Taskforce on Obesity: http://www.iotf.org/database/GlobalAdultTableJune07.htm RE: the BMI debate – the problem is that the examples of people who don’t fit the BMI – fit folks here and athletes – are NOT the norm for the population in general. Honestly, how many of those 30% obese do you suppose are muscled athletes? Look around you. In my community, I see a lot more pudgy people than ripped bodies. The only way to measure fat accurately and quickly is through calipers, right? Compiling more accurate national and international statistics on obesity would require a… Read more »
Sara
9 years 29 days ago

Sonagi: “Everybody knows an old codger who smoked, drank, and ate bacon every morning yet still lived to a ripe old age. However, most of the old codger’s relatives and friends dropped dead long before.”

Absolutely. I wouldn’t recommend anyone following a certain lifestyle just because someone else had success with it (even in my own case of switching to a higher fat diet). You have to research and find what’s best for your body.

I like your point about genes and destiny. I just saw a piece about how children’s distaste for vegetables is genetic. Oh, brother…

Caloi Rider
9 years 28 days ago
Sonagi—legitimate point about national statistics. So for national statistics’ sake, we’ll keep the BMI. But anyone who can afford a bodyfat analysis should probably take the time to get one. Here’s something else to take into account (link at the bottom, if you want to check it out): “Even people with normal Body Mass Index scores — a standard obesity measure that divides your weight by the square of your height — can have surprising levels of fat deposits inside. “Of the women scanned by Bell and his colleagues, as many as 45 percent of those with normal BMI scores… Read more »
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Matthew
Matthew
1 year 7 months ago

This article is invalid due to the fact that the source is from a Wikipedia page. That is not a valid source. Get your sources right!

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