As You Get Older, Losing Muscle May Be a Bigger Problem Than You Think

For decades, we've been taught to obsess over one number:

Our weight.

Lose weight. Get the scale down. Burn more calories. Eat less.

But as we get older, there's another number we should probably be paying a lot more attention to:

How much muscle and strength are we keeping?

Dr. Gabrielle Lyon, a physician known for her approach called Muscle-Centric Medicine, has been outspoken about this. Her basic argument is that we've spent decades focusing on the problems associated with being over-fat, while not paying nearly enough attention to the consequences of becoming under-muscled.

That doesn't mean gaining excessive body fat is harmless. Far from it.

But especially as we get into our 40s, 50s, 60s and beyond, getting lighter isn't automatically the same thing as getting healthier.

Muscle Is About a Lot More Than Looking Good

When people hear "build muscle," they often think bodybuilding.

That's not what we're talking about.

Muscle is what allows you to keep doing normal life without needing someone else's help.

It's being able to get out of a chair without pushing yourself up with both hands.

Carry your groceries into the house.

Walk up and down the stairs when you're visiting friends, family or your grandkids without wondering if you can handle it.

Get down on the floor to play with your grandkids—and get yourself back up without a cry for help.

Carry a suitcase through the airport.

Work in the yard.

Play golf.

Put something heavy on a shelf.

And catch yourself when you stumble instead of ending up on the ground.

Those things might not sound like "fitness."

But that's exactly what fitness is.

We're not building muscle just so you can lift more weight in the gym.

We're building muscle so life outside the gym stays easier for as long as possible.

One of the most important things strength can help preserve as we age isn't a six-pack.

It's independence.

The Scale Can Fool You

Here's where I think a lot of people get into trouble.

Let's say you're 55 and decide you need to lose 30 pounds.

So you drastically cut calories.

You start doing tons of cardio.

You don't strength train.

And you're barely eating enough protein.

Six months later, congratulations—the scale says you're 30 pounds lighter.

But there's an important question nobody seems to ask:

What exactly did you lose?

Hopefully, most of it was body fat.

But if you also lost a significant amount of muscle, that 30-pound weight loss isn't quite the victory the scale makes it appear to be.

This is why I constantly tell clients:

The goal isn't simply weight loss. The goal is fat loss while preserving—and ideally building—muscle.

There's a big difference.

Does That Mean Body Fat Doesn't Matter?

Absolutely not.

And this is where we need some common sense.

I'm not suggesting you can gain unlimited amounts of body fat and everything is fine as long as you're strong.

Excess body fat—particularly obesity and excess visceral fat—is associated with increased risk for cardiovascular disease, type 2 diabetes and numerous other health problems.

Within reason, however, I'd much rather see someone become obsessed with getting stronger than obsessed with becoming smaller.

Because body weight alone tells us very little about what your body can actually do.

Someone who weighs a little more but is strong, active and carrying healthy amounts of muscle may be in a very different position from someone who weighs less but has very little muscle and poor strength.

Strength May Matter Even More Than Muscle Size

Here's another important distinction.

We don't just want muscle mass.

We want muscle that actually works.

Research on aging consistently shows that muscle strength is strongly associated with physical function, disability risk and mortality. Strength can also decline faster than muscle mass as we age.

So maintaining muscle is important.

Maintaining your ability to USE that muscle is even more important.

That's why I'm much more interested in whether you can squat, push, pull, carry, climb stairs, balance and get yourself off the floor than I am in what number appeared on your bathroom scale this morning.

"I'm Getting Older" Isn't a Training Program

Yes, our bodies change as we age.

Recovery can change.

Hormones change.

Muscle becomes more difficult to maintain.

But there's a huge difference between recognizing that aging occurs and simply surrendering to it.

Resistance training gives your body a reason to keep muscle.

Protein gives your body the raw materials it needs to maintain and repair it.

Movement keeps you capable.

And continuing to challenge yourself sends your body a pretty simple message:

We still need this muscle. Don't get rid of it.

That's also why walking, as beneficial as it is, shouldn't completely replace strength training.

Walk.

Absolutely.

But lift something too.

Stop Training Only to Be Smaller

This may be the biggest mindset change I want people over 40 to make.

Stop walking into the gym thinking:

"How many calories can I burn?"

Start asking:

"What can I do today that will make my body stronger and more capable 10, 20 or 30 years from now?"

That changes your priorities.

Strength train.

Eat enough protein.

Walk.

Stay mobile.

Sleep.

Recover.

Keep your body fat in a healthy range.

And protect your muscle.

Because someday the question probably isn't going to be:

"What did I weigh when I was 70?"

It's going to be:

Can I still climb those stairs?

Can I carry my own groceries?

Can I put my suitcase in the overhead compartment?

Can I get on the floor with my grandkids—and get myself back up?

Can I continue doing the things I love without constantly needing someone else's help?

That's what we're training for.

Don't just train to live longer. Train so you can keep living your life.

Fitness isn't just about effort—it's about direction.

No intimidation. No gimmicks. Just smart training, realistic nutrition, and coaching for the long game.

This article is for educational purposes and is not intended as medical advice.