BMI Is Bullsh–

14 Sep

mindy_gif

We are data-centric creatures. As much as many of us cringed at the thought of algebra, we all love numbers. Numbers are definite. Two plus two will always be four. You will always be one year older on your birthday. It took two humans to create one human you. All of these things are facts for us to base future decisions off of.

Much like the BMI. Your body mass index is there solely to help you make future decisions. But recognize that the BMI is also bullshit.

Think of it this way: A 5-foot-8, 140-pound woman and her 5-foot-2, 115-pound friend can easily wear the same size 4 dress. How? Because the way our bodies are shaped help determine what fits, not necessarily the numbers involved with it. Your size 10 jeans from the Gap may fit like a dream. Buy those jeans in the same cut from Levi’s and you’ll probably need a different size. It’s not that your body changed significantly. It’s just that the jeans were made differently.

This point was proven further earlier this year when Body Labs released its BMI Visualizer. The visualizer creates a 3D composite of a person’s body based on three factors: gender, height and weight. That’s it. Like most BMI calculators, it doesn’t take into account activity level, fat vs. muscle mass or mass distribution.

When I did my visualizer, it looked nothing like my current body shape. For example, this was taken a few weeks ago before a race.

IMG_2289

This is what it says my body looks like.

visualizer

Obviously, there are a few differences. I’m short, but I’m not that squat-shaped. I’ve got a tummy, but not that much of a gut. It got the pear shape right, though. The Visualizer also doesn’t look like I work out much, which we all know is a flat-out lie.

The folks at Body Labs took several body scans of people with similar heights and weight and came up with different proportions for all of them. How is this possible? Because the BMI is bullshit.

visualizer_all_bodies

Don’t worry so much about what the BMI is telling you. If you are truly concerned about your health and weight, stay in contact with your physician. Have your doctor refer you to a nutritionist. The best way to monitor your weight is to take care with your caloric intake. Cutting calories will help you lose weight faster, exercise will help you shape your body.

If you really want to concern yourself with a number, calories should be your No. 1 priority. Calories fuel the body, but you don’t want to top off your tank. Get enough to get you where you need to be, not so much that you’re just sitting around on useless fuel. Then worry about he amount of fat, next cholesterol then sodium. The thing is that you need all of these things, but in moderation.

The BMI is a tool, not the toolkit. Think of your health as building a house, and the BMI is your hammer. You still need wood, a level, nails, screwdriver, etc. The hammer is useless without everything else.

Advertisements

Now What?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: