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FitnesS Facts for women

Author: Marguerite Keel, CPT, CNC, PBC | Located in Norfolk VA

Why Cardio Stops Working As Meaningful Fitness For Women After 35

3/19/2026

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 A Moment of Perspective
Last week, I attended a local St. Patrick’s Day parade.
A running club came through, and I found myself genuinely cheering them on.
Running is not easy. It takes commitment, consistency, and effort. It can even be painful.
But as they passed, as a Personal Trainer, I noticed something that stayed with me.
None of the mature women had the “runner’s body” we often associate with the sport—lean, slender, almost effortless in appearance.
And that’s not a criticism.
It’s a reality check.
Because what we often expect from certain types of exercise… doesn’t always match what actually happens.
Especially after 35.

When Effort and Outcome Stop Matching
There comes a point where effort and outcome stop aligning.
You’re working hard.
You’re consistent.
You’re doing what feels productive.
And yet… your body isn’t changing in the way you expected.
This is often where frustration begins.
Not because you’re doing nothing—but because what you’re doing no longer aligns with what your body needs.

Why Cardio Feels So Effective
Cardio feels like work.
You sweat.
You finish a session.
You complete a class, a run, a workout.
There’s a clear beginning and end.
A sense of accomplishment.
And for many women—especially those used to being productive in every area of life—that matters.
You did something. You finished it. You checked the box.
But here’s the important question:
Is it actually producing the result you want?
Because effort and outcome are not always the same thing.

Recognizing When It’s Not Working
Many women stay committed to cardio long after it stops being effective for their goals.
You might notice:
  • Your weight fluctuates, but your shape doesn’t change
  • Certain areas (like the midsection or thighs) remain the same
  • You feel active—but not stronger or more defined
At some point, it’s worth asking:
Is this approach helping me build the body I want?
Not just burn energy—but actually change.

The Misalignment Between Effort and Outcome
Activities like running, classes, or recreational sports are not easy.
They require effort, coordination, and consistency.
And they absolutely have value:
  • Cardiovascular health
  • Mental clarity
  • Endorphin release
  • Community and enjoyment
But they are not designed to reshape the body in a meaningful way.
And that’s where the disconnect happens.

The Standard vs. Reality
There is a long-standing image of what a “fit” female body should look like:
Slender.
Light.
Effortless.
But much of that standard is tied to youth—not necessarily to training.
That doesn’t mean a strong, defined, and lean body isn’t possible later in life.
It absolutely is.
But it requires more intention.
More structure.
More awareness.
More strategy.
Not just more movement.

The Hidden Cost of Cardio-Only Training
Cardio-heavy routines can come with hidden costs when they’re not balanced with strength work.
Running, for example, is repetitive and demanding.
Without adequate strength:
  • Weak glutes and adductors can affect knee stability
  • Foot mechanics (like pronation) can create imbalances up the chain
  • Hips and lower back can compensate
  • Upper body strength and posture are largely unaddressed
Over time, this can increase the risk of:
  • Knee discomfort
  • Foot and ankle issues
  • General wear and tear
Especially in a body that already spends much of the day sedentary.

What Cardio Doesn’t Train
Cardio—especially steady-state—has limits in what it develops.
It does not meaningfully build:
  • Strength
  • Muscle tone
  • Postural support (upper back, shoulders)
  • Grip strength
  • Reactive ability (needed for balance and fall prevention)
Even cardiovascular progress can plateau once a certain pace or distance becomes comfortable.
The metrics—time, distance, completion—stay the focus.
But the body stops adapting in a meaningful way.

There Is Another Approach
This is where resistance training comes in.
Not as a replacement for movement—but as the missing piece.
Resistance training:
  • Builds and preserves muscle
  • Improves structure and shape
  • Supports joints and movement patterns
  • Creates the stimulus needed for real adaptation
It is not about doing more.
It’s about doing what works.
And it is one of the most evidence-based ways to:
  • Improve body composition
  • Support long-term health
  • Maintain strength and independence over time

Redefining Your Approach
This doesn’t mean eliminating cardio.
It means redefining its role.
Cardio can support:
  • Health
  • Movement
  • Enjoyment
But it cannot carry the full responsibility of changing your body.
And when too much emphasis is placed on it—especially in the pursuit of specific aesthetic goals—it can lead to frustration, plateau, and unnecessary wear on the body.

Becoming the Next Version of You
As life evolves, so should the way you train.
Just as you grow in:
  • Your career
  • Your roles
  • Your perspective
Your approach to fitness can evolve as well.
Not to return to a body you once had.
But to build one that reflects where you are now.
One that is:
  • Strong
  • Capable
  • Intentional
  • Enduring
Not the body of a younger version of yourself.
But the body of a woman.

PRIOR POST - Why Cardio for Women Isn’t the Problem—It’s the Strategy
NEXT POST - Why Weight Loss Doesn’t Change Your Body (And What Does)

👉If you are struggling with how to make your body stronger and healthier after the age of 35, here are the three things you need to know, plain and simple.
DOWNLOAD THE MIDLIFE MUSCLE GUIDE HERE

If you’d like help applying this approach to your own training, I’d be glad to help. 
On-site programs include Gym Training, Personal Training, and coaching for non-competitive and competitive physique athletes. Contact us at [email protected]
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