The most important body is not the one you see in the mirror
You can look healthy and slowly decay on the inside. It's one of the greatest illusions in health, and I think it costs more people their futures than almost anything else. Because it tricks us into thinking we're in control, until one day we're not. Let me explain what I mean.
We're judging the wrong thing.
When we decide if someone is fit, we look at the outside. Flat stomach. Normal weight. Clothes fit well. And then we think, about ourselves or about someone else: "He seems to be in great shape." It's entirely human. That's what we can see. But it's also the wrong thing to look at.
Because the body doesn't care one bit about how it looks. It cares about how it works. And how it looks and how it works are two completely different things – they can go in completely opposite directions without you noticing.
What's going on beneath the surface
Here's the unpleasant part. From the age of fifty, the following can be going on in your body simultaneously, silently, without the mirror revealing a thing:
Muscles slowly disappear, year after year, if you don't give them a reason to stay.
The fat is increasingly accumulating around the organs inside the abdomen the dangerous kind, the kind that drives inflammation and disease – instead of under the skin where you see it.
The skeleton becomes more fragile, completely without symptoms, until something breaks.
Your fitness deteriorates, so that the heart has to work harder for the same walk.
Metabolism slows down, partly because muscle mass decreases.
None of this is visible. None of it hurts. The scale can even show the same number for ten years, because the muscle you lose weighs about as much as the fat you gain. The number stands still while your body is being replaced inside. That's why I call it an illusion. Everything looks calm on the surface, while the foundation is slowly deteriorating.
The day it shows
The problem with silent changes is that they don't stay silent forever. One day they will be heard.
It doesn't usually come as a big dramatic realization. It comes as little moments. The stairs suddenly feeling heavier than they used to. That you get up from your armchair more slowly than before. That your balance wavers when you reach for something. That you simply have less stamina than you did five years ago.
And then – only then – do many people start to take it seriously. But the changes you notice that day have been building up for a long time, quietly. It is rarely a sudden deterioration. It is a long neglect that eventually becomes visible.
The good news is that the same thing applies the other way around. If you build up the invisible body in silence, year after year, you won't even notice it until one day – when you're eighty and still standing up without any problems, still carrying your own bags, still walking up the stairs without thinking about it.
We measure the wrong things
All of this is really about us focusing on the wrong things. We talk far too much about what the body looks like, and far too little about what it can actually do.
The scale has ruled the bathroom for a hundred years. BMI is pressed into our hands at every doctor's appointment. Mirrors and photos determine how we feel. But none of those measurements say much about what actually determines your future: whether you will be able to fend for yourself, move freely, and live strong for the next twenty, thirty years.
So after fifty I've changed what I care about. I now choose every time:
Stronger legs over thinner legs.
More muscle means a lower number on the scale.
Better fitness over lower BMI.
Less belly fat in front of a flat stomach for appearance's sake.
They are not the same thing, and the difference is crucial. The first in each pair is about what the body can do. The second is about what it looks like. And it is always the first that determines how your life will be.
What you should measure instead
If you want something concrete to go by, let go of the scales as the sole judge and look at this:
Your waist measurement, which captures the dangerous belly fat. A good guideline is that it should be less than half your body height.
Your strength, in practical terms. How many times can you get up from a chair in thirty seconds? Can you carry the grocery bags all the way home? Can you climb the stairs without stopping?
Your fitness, just as practical. Are you out of breath on a hill you took without thinking a few years ago?
These measurements don't lie. They don't care about how you look in the mirror. They tell you how your body actually works—and that's the only information that matters in the long run.
The Body You Don't See
Ultimately, it's not the body in the mirror that determines how you'll live the rest of your life. It's the body you don't see.
The one on the inside . The muscles, the skeleton, the heart, the blood vessels, the metabolism.
And you don't build it in a weekend, and not with a diet. You build it slowly, with every workout. Every walk. Every protein-rich meal. Every good night's sleep. Boring, repetitive, invisible – and the only thing that actually works.
I'm 63 years old and I exercise every day. Not to look good in a photo, although that's a nice bonus. But because I want to be able to get out of a chair without thinking about it when I'm eighty-five. I want to carry my own bags. I want to play with the grandchildren on the floor and be able to get back up.
The most important body is not the one that others see. It's the one that will carry you for the rest of your life.
So I leave you with an honest question, the same one I ask myself sometimes:
How much of your training is about how you look – and how much about what you want to be able to do when you're eighty?
All the best,
Kennet Bath
Founder, Bodyweight Diet
Do you want to build the invisible body – the one that will carry you? The Bodyweight Diet app has programs you can do at home, without equipment, built for those over fifty. Not to look good in a photo, but to keep you strong and independent all the way.
