Recently, one of my clients, Layla, asked me something I hear all the time from clients and patients:

I’ve been trying to get stronger for the last 10 years, and I’ve tried everything. Why aren’t my core muscles strong despite my efforts, and why don’t they show even though I work out consistently?

If that sounds like you, you’re in good company. You’ve done the crunches, held the planks and followed the ab challenges, and the mirror still isn’t showing the core muscle tone and definition you’ve been working for. The good news is that your effort probably hasn’t been wasted. You’ve likely been working on only one part of the problem.

What Are Your Core Muscles?

Your core has three major muscle groups (plus some smaller supporting muscles):

1. Rectus abdominis: the “six-pack” muscle that runs down the front of your abdomen
2. Obliques: the muscles along the sides of your torso that help you rotate and bend
3. Gluteal complex: your glutes, which stabilize your pelvis and power nearly every movement you make

These muscles respond very well to training. When the training is consistent, most people build real strength and muscle mass in them.

Quotation — So the problem usually isn’t your muscles. It’s what’s covering them.

Body Fat Percentage: The Gatekeeper of Visible Abs

When people say they want a “toned core,” they usually mean visible abdominal definition: the six-pack or even the eight-pack. Whether you can see those muscles depends mostly on your body fat percentage.

Here are the general ranges where abdominal definition starts to show:

You can have well-developed abs and still not see them if there’s a layer of subcutaneous fat, the fat just under your skin, over your abdominal wall. That’s true no matter how many crunches or planks you do.

The Spot Reduction Myth

Let me be really clear about this one, because there’s a lot of confusion around it:

Quotation- Spot reduction doesn’t work. You can’t lose fat from one area of your body by training that area.

Fat loss happens systemically, across the whole body. Where you lose fat first, and where you hold on to it, depends largely on your genetics and your hormones.

That’s also why many women and men in midlife notice more fat collecting around the belly during perimenopause or andropause. The body is shifting where it stores fat, and no number of ab exercises can override that.

Core Training Isn’t the Same as Fat Loss

This is the second big reason your abs may not be showing: training your core doesn’t burn much body fat.

Ab exercises build the muscle underneath, but they burn relatively few calories. On their own they don’t create the calorie deficit you need to lower your overall body fat.

So someone doing hundreds of crunches a day really is building a stronger core. They just can’t see it, because the nutrition and fat-loss side of the equation was never addressed.

Core exercises give you a stronger core. Nutrition decides whether you can see it.

What “Toned” Actually Means

“Toned” isn’t a separate physiological state.

What we call toned is a combination of three things.

1. Enough Muscle Mass

You need a reasonable amount of muscle so there’s actually something to see under the skin. You build it through progressive resistance training, gradually increasing the weight, reps or difficulty over time. Doing the same routine forever won’t keep building muscle.

2. Low Enough Body Fat

To reveal those muscles, your body fat has to be low enough. That comes mostly from nutrition and a calorie deficit sustained over time, not from which exercises you pick. This is the piece most people underestimate: diet plays a bigger role in visible muscle definition than your workout does.

3. Consistency Over Months and Years

Consistency, consistency, consistency, over months and years rather than weeks. Building muscle and losing a meaningful amount of fat are both slow processes. Patience plus consistently doing the right workouts is what produces results.

The Bottom Line

If you’ve been training your core for years without seeing definition, here’s what to take away:

• Your core is probably stronger than you think. The muscle is there. It’s hidden under a layer of fat.
• You can’t crunch away belly fat. Spot reduction is a myth, and fat loss happens across your whole body.
• Definition comes mostly from nutrition. A sustained calorie deficit lowers body fat enough to reveal your muscles.
• Keep building muscle with progressive resistance training so there’s something to reveal.
• Think in months and years, not weeks.

Visible core definition comes from muscle you’ve built plus low enough body fat, kept up consistently over time. Once you add the nutrition piece to the training you’re already doing, results start to show.

Have a question about balancing your career with your health? Send it in, and it may be answered on a future episode of the 9 to 5 Wellness podcast. Listen to the full Q&A episode, which also covers health fatigue, wherever you get your podcasts.

This post was originally a 9 to 5 wellness podcast and was posted on aeshatahir.com.