July 10, 22026
Author: Ava Durgin
Assistant Health Editor
Image by Eli Ritter
For a long time we looked at muscle and saw a costume. A way to look lean, ton, athletic. Aesthetic choices.
We were wrong.
Or at least, we were narrow.
Gabrielle Lyon is a physician and the kind of doctor who doesn’t let you hide behind a six-pack if your bloodwork is garbage. She calls it muscle-centric medicine. To Lyon, skeletal muscle isn’t decor. It’s one of the only organs you can actually build more of. It’s a longevity engine.
And most people? They’re only running on one cylinder.
“Strength isn’t optional. It’s a a responsibility.”
Three buckets. One blind spot.
Lyon thinks about muscle in buckets.
Three of them.
Most workout programs—especially the ones sold to us by influencers and gym bros—only tap one.
1. The Metabolic Bucket
Here’s the thing about glucose. Your liver isn’t the only storage tank. Your muscles are the primary dumping ground.
When you have more healthy tissue there, your body handles blood sugar like a champ. Eat more healthy tissue. Handle sugar better. Simple physics.
But here’s where it goes sideways.
When muscle sits idle, it infiltrates with fat. The glucose stays in the blood. The liver gets tired. Insulin resistance creeps in. It starts in the muscle, not the pancreas. That’s the missed diagnosis. Resistance training keeps that metabolic fire lit. Without it, your carb metabolism stalls.
2. The Plumbing Bucket
Think about flow. Blood flow.
Lyon calls this the body’s plumbing system.
Cardio is important, sure. But muscle? Muscle drives circulation. It supports vascular function. If you want to know how resilient your arteries are, look at your strength. Not your watch data. Your strength.
Recent studies link bigger muscles and stronger contractions to better sexual function. It’s a blunt indicator. But it tells you everything you need to know about endothelial health and blood vessel integrity. If the pipes work well in one area, they work well everywhere. Muscle keeps the plumbing from clogging.
3. The Structure Bucket
This is the one everyone knows. Hypertrophy. Size. Force.
We do it to look good in t-shirts. We shouldn’t. We should do it because it protects bones. It aids balance. It keeps us walking up stairs when we are eighty years old.
People treat strength and mass as separate goals. They aren’t. They are on a continuum. You lift heavy, you grow, you get strong. You get resilient. It’s the foundation of independence. Lose the foundation and you fall. Literally.
Why your aesthetic-only routine is failing you
Here is a hard pill.
If you lift solely for appearance, you are leaving two-thirds of the benefit on the table.
That is a bad investment.
Lyon’s argument is direct. Training for health means programming for all three buckets. You need to challenge the strength. You need to spike the metabolic demand. You need to improve the tissue quality.
Does this mean you have to train like a pro athlete? No.
It means you have to be consistent. And progressive. And honest.
Nutrition matters here too.
You cannot build a house with no bricks. Protein is the brick. If you under-eat it, your training plan is fiction.
What actually works
It isn’t complex. Complexity is a selling tactic.
- Resist twice a week minimum. Stimulate the growth.
- Use full-body movements. Big muscles. Big metabolic hit.
- Move the other days. Keep the tissue metabolically active even if you aren’t lifting iron.
- Eat enough protein. Adequate. Not a buzzword. Adequate for repair.
The open question
We spend so much time fearing aging.
We buy creams. We try diets.
But the biggest lever is already under our skin.
Muscle protects the metabolism. It pumps the blood. It holds the body together.
It stops aging from being a slow fade and makes it a manageable variable.
It starts with a rep. Or a meal.
Will you do it for the mirror? Or for the decades?
