My wife, Bless her Heart, strives daily to live as healthy of a life as she can. She constantly watches her diet, trying different suggestions that she finds hither and yon. She goes to Water Aerobics weekly, and tries to get in her “necessary steps” on a daily basis. It is that latter statement that I want to discuss here today.
As many of you know, one of my favorite pastimes is meeting with members of the group I started known as the PHOENIX PHILOPSPHY PHAN PHORUM. We get together, sometimes two or three at a time and sometimes en masse, and discuss sundry facts and items of interest that we come across. One source of these points of interest is magazine articles that we read. A particularly interesting topic came from the SPRING 2020 issue of POPULAR SCIENCE. Following are the notes that I typed regarding “10,000 steps:”
Don’t Fret About 10,000 Steps a) The “10,000” first came about in 1965 via a Japanese company, Yamasa Clock. b) Yamasa created a personal-fitness Pedometer called the Manpo-Kei, which means “10,000 Steps.” c) The Japanese symbol of “10,000” resembles a person walking/running, which is how Yamasa landed on the name … and the number! d) This number has ABSOLUTELY NO Scientific significance. e) A study has shown that in older women only 4400 footfalls lowered the risk of death, and that the benefit tapered off at about 7500! Apparently, 10,000 steps is NOT a “Magic Number” at all!
Now, I don’t know about you but I find this extremely interesting … as a society, we bought into the “10,000 Steps Myth” and nobody, apparently, ever thought to ask where the number came from! From what I can surmise, the “10,000” comes from a Japanese symbol used by a clock maker!
Here’s another one regarding health that I marvel at: BMI – Body Mass Index. Now, most of us know that this is used to measure “body fat,” and that, supposedly, it tells us how “healthy” we are! Recently, however, NPR did a piece on it, and this is what they shared:
The BMI Formula
- BMI = weight in pounds/(height in inches x height in inches) x 703
- The 703 is to convert the index from the original metric version of the formula.
- Below 18.5 = Underweight
- 18.5 to 24.9 = Ideal
- 25.0 to 29.9 = Overweight
- 30.0 and above = Obese
Americans keep putting on the pounds — at least according to a report released this week from the Trust for America’s Health. The study found that nearly two-thirds of states now have adult obesity rates above 25 percent.
But you may want to take those findings — and your next meal — with a grain of salt, because they’re based on a calculation called the body mass index, or BMI.
As the Weekend Edition math guy, I spoke to Scott Simon and told him the body mass index fails on 10 grounds:
1. The person who dreamed up the BMI said explicitly that it could not and should not be used to indicate the level of fatness in an individual.
The BMI was introduced in the early 19th century by a Belgian named Lambert Adolphe Jacques Quetelet. He was a mathematician, not a physician. He produced the formula to give a quick and easy way to measure the degree of obesity of the general population to assist the government in allocating resources. In other words, it is a 200-year-old hack.
2. It is scientifically nonsensical.
There is no physiological reason to square a person’s height (Quetelet had to square the height to get a formula that matched the overall data. If you can’t fix the data, rig the formula!). Moreover, it ignores waist size, which is a clear indicator of obesity level.
3. It is physiologically wrong.
It makes no allowance for the relative proportions of bone, muscle and fat in the body. But bone is denser than muscle and twice as dense as fat, so a person with strong bones, good muscle tone and low fat will have a high BMI. Thus, athletes and fit, health-conscious movie stars who work out a lot tend to find themselves classified as overweight or even obese.
4. It gets the logic wrong.
The CDC says on its Web site that “the BMI is a reliable indicator of body fatness for people.” This is a fundamental error of logic. For example, if I tell you my birthday present is a bicycle, you can conclude that my present has wheels. That’s correct logic. But it does not work the other way round. If I tell you my birthday present has wheels, you cannot conclude I got a bicycle. I could have received a car. Because of how Quetelet came up with it, if a person is fat or obese, he or she will have a high BMI. But as with my birthday present, it doesn’t work the other way round. A high BMI does not mean an individual is even overweight, let alone obese. It could mean the person is fit and healthy, with very little fat.
5. It’s bad statistics.
Because the majority of people today (and in Quetelet’s time) lead fairly sedentary lives and are not particularly active, the formula tacitly assumes low muscle mass and high relative fat content. It applies moderately well when applied to such people because it was formulated by focusing on them. But it gives exactly the wrong answer for a large and significant section of the population, namely the lean, fit and healthy. Quetelet is also the person who came up with the idea of “the average man.” That’s a useful concept, but if you try to apply it to any one person, you come up with the absurdity of a person with 2.4 children. Averages measure entire populations and often don’t apply to individuals.
6. It is lying by scientific authority.
Because the BMI is a single number between 1 and 100 (like a percentage) that comes from a mathematical formula, it carries an air of scientific authority. But it is mathematical snake oil.
7. It suggests there are distinct categories of underweight, ideal, overweight and obese, with sharp boundaries that hinge on a decimal place.
That’s total nonsense.
8. It makes the more cynical members of society suspect that the medical insurance industry lobbies for the continued use of the BMI to keep their profits high.
Insurance companies sometimes charge higher premiums for people with a high BMI. Among such people are all those fit individuals with good bone and muscle and little fat, who will live long, healthy lives during which they will have to pay those greater premiums.
9. Continued reliance on the BMI means doctors don’t feel the need to use one of the more scientifically sound methods that are available to measure obesity levels.
Those alternatives cost a little bit more, but they give far more reliable results.
10. It embarrasses the U.S.
It is embarrassing for one of the most scientifically, technologically and medicinally advanced nations in the world to base advice on how to prevent one of the leading causes of poor health and premature death (obesity) on a 200-year-old numerical hack developed by a mathematician who was not even an expert in what little was known about the human body back then.
I find it interesting how so many Americans are concerned about their Physical Well Being, and so few are equally concerned about their Spiritual Well Being! We rely on formulas and calculations that may or may not be valid, and strive diligently to adhere to them when it comes to our health, yet we balk when it comes to the truth of John 3:3 – Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
The GOOD NEWS is that because of John 3:3 we can attend to our Spiritual Well Being … and, we don’t have to walk 10,000 Steps a day to maintain it!