Saturday, October 18, 2014

Schools give harmful BMI report cards

Most of us remember high school. Those who don't decided to give students body mass index report cards.

In short, some schools, in an effort to help students be aware of what they eat and weigh, started administering BMI tests to students. The tests are then sent home to parents with a report on suggested eating habits and lifestyle changes.

The Examiner does a great job explaining why this is a bad idea, citing bullies and shaming and encouraging eating disorders.

The root of this problem is the false belief that BMI tests are at all scientifically accurate in determining health.

Prince Fielder,
Professional Baseball Player,  BMI 37.3 Very Obese
Developed over 150 years ago, the body mass index measures only that. In case you've never had one. They take grips of your body and measure it with a caliper. These measurements are then set into a standard equation with ones weight and height.

The problem is the equation is set up for average built females roughly 5'11". he farther one deviates from the mean height the more inaccurate the information becomes. For example, Professional Football player Eli Manning, at 218lbs. 6'3" has a BMI of 27.2. Overweight.

Most demeaning of this measure of body mass is it's suggested correlation with health. This is so ingrained with society that some insurance lobbies have suggested using BMI in paid premium determinations. Having those classified as overweight pay more accounting for the research that shows they're increased risk.

Oddly, in 1998 the NIH and CDC reclassified overweight BMI from 27.8 to 25, effectively overnight making 29 million Americans overweight. They were all healthy the day before, now they're told to lose weight. This done with no concern how they feel or perceive themselves -- no medical check-up with a primary physician. Is that something we want done to our kids?

Specifically, consider my case. At my lowest, most malnourished weight I was 175lbs. I'm 6'3". The BMI chart, at that height and weight, set me directly in the center on the "normal" BMI range.
Consider then, my psychologist and doctors trying to tell me I need treatment for my eating disorder when I can clearly see my body mass index is within normal range.

Now, extrapolate that information to the hundreds of thousands of at risk teens receiving these measurements at school.

Faulty information and science (in this case BMI) make terrible way-points to a healthy society. As long as our culture continues to yolk health and weight together, progress will be slow and harmful.

One chart to rule them all.





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