Healthy Obesity

A Stick of Dynamite That Hasn't Been Lit Yet

Good labs don't mean you're fine. They mean the damage hasn't started yet.

There's a debate happening in the medical community right now about something called "healthy obesity." The idea is that a person who is significantly overweight but shows no current signs of disease — normal blood pressure, no diabetes, clean liver enzymes, good cholesterol — is metabolically healthy and doesn't need to be treated as a weight problem.

I don't believe in it.

The Dynamite Argument

Here's my position: a person who is 100 pounds overweight but passes every test on paper is a stick of dynamite that hasn't been lit yet.

The potential for damage is there. The fuse is present. The problem is structural, and it's accumulating silently in ways that lab work won't catch until it's already become something serious.

The simplest example is the knees.

Every pound of body weight exerts roughly four pounds of force on the knee joint during normal walking. An extra 100 pounds means 400 additional pounds of pressure on the cartilage with every step. Cartilage doesn't regenerate meaningfully once it's worn down. There's no blood supply to repair it. You grind it away gradually, with no pain warning system until it's mostly gone — and by then, the damage is done.

You don't need to look at a lab result to understand this. Look at carpet layers. They're often in reasonable physical shape. But you almost never see a carpet layer still doing the job in their 40s. Years of kneeling, rising, and moving on hard floors destroys the joint — not because they were overweight, but because the cumulative mechanical load exceeded what the cartilage could absorb over time.

Now add 100 pounds of extra weight to that equation and run it for 20 years.

The labs look fine right up until the knee replacement.

The BMI Problem

While we're on the subject of how we measure healthy weight: the body mass index is not a reliable tool for individuals, and I want to be honest about why we're still using it.

BMI was developed in the 1800s by a Belgian mathematician studying population statistics — not a clinician, not someone treating patients. By his own assessment, after a decade of work, he concluded it wasn't appropriate for evaluating individuals. It was a tool for analyzing trends across large groups, not for determining whether a specific person is at a healthy weight.

Here's what happens when you apply it to individuals anyway.

Arnold Schwarzenegger at the peak of his career — Mr. Universe, arguably the most physically conditioned human being alive at the time — had a BMI of 32. By the clinical definition, he was obese. Clearly, the tool is not measuring what we think it's measuring.

On the other end: I see patients at 110 pounds with visible abdominal fat — a meaningful health indicator — whose BMI puts them in the normal range. The number says they're fine. They're not quite fine. The fat distribution tells a different story than the ratio of height to weight.

BMI measures one thing: weight relative to height. It cannot distinguish between a pound of muscle and a pound of fat. It cannot account for where fat is stored. It cannot tell you what's happening inside the body. Using it as a primary indicator of metabolic health is a shortcut that leads to wrong conclusions in both directions.

What We Actually Look At

Healthy weight is relative and individual. The meaningful question isn't whether a number on a chart puts you in a category — it's whether your body is carrying a structural load it can sustain long-term without damage.

The silent damage — to joints, to the cardiovascular system, to insulin sensitivity — doesn't announce itself until it becomes a clinical problem. By then, the conversation shifts from prevention to management.

I'd rather have it before that.

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