Why Core Strength Is About More Than Visible Abs

Let's talk about the core.

Because fitness has always had an aesthetic attached to it.

The 90s gave us skinny culture. The 2000s swung hard in the other direction and celebrated curves. And since the Pilates boom post-COVID, we've somehow landed right back at the size-0 ideal — except now she's wearing an Alo set, drinking a green juice and casually showing off a perfectly flat stomach while telling us this is what "strong" looks like.

And listen...I love an Alo set.

But let's actually think about this for a second.

A flat stomach is not the definition of a strong core.

And I honestly think that's something the Pilates industry should be talking about a hell of a lot more.

Your core can be incredibly strong without being flat, defined or remotely resembling the stomach of the person teaching your class. Genetics, body composition, hormones, nutrition and a whole host of other factors influence what your midsection looks like.

Strength is what your body can do. Aesthetic is what your body looks like. They're not the same thing.

Your Core Has a Job to Do

Your core isn't there just to look good in leggings.

It helps stabilize your body when you're standing, walking and balancing. It helps you rotate when you turn around to grab something behind you. It helps you control your body when you're running, lifting, pushing and pulling. It's part of what allows you to pick up your kids, carry your groceries, get something off the top shelf or get yourself up from the floor. And it helps create stability through your spine and pelvis so the rest of your body has a strong foundation to move from.

That's core strength.

Not whether you can see your abs.

Not whether your stomach is flat.

Not whether you look like the person in the Instagram Reel demonstrating the exercise, at the right angle, in the perfectly lit room…I said what I said.

Your core has a job to do, and a good training program should be focused on helping it do that job well.

Your Hormones Can Change How Your Core Looks, Too

And then there's another piece of the conversation that doesn't get nearly enough attention: your hormones.

If you have a menstrual cycle, your body isn't physically identical every day of the month.

The menstrual cycle moves through four phases — menstrual, follicular, ovulatory and luteal — and the fluctuations in estrogen and progesterone throughout that cycle can affect things like fluid retention, digestion, appetite, energy and how bloated or "tight" your midsection feels.

That means there may be days when your stomach looks flatter, days when you feel more bloated, and days when your abdomen or pelvis simply feels different.

That isn't you gaining or losing a bunch of body fat overnight. It's your body responding to normal physiological changes.

And this is another reason I hate using a perfectly flat stomach as the measuring stick for whether your core is "working."

Your body is going to change throughout the month.

Your hormones change. Your digestion changes. Your hydration changes. Your muscles can hold more or less fluid depending on training and recovery.

None of that means your strength disappeared.

So instead of asking, "Why doesn't my stomach look the same today?" I'd rather you ask, "What is my body capable of today?"

That is a much more useful conversation about core strength.

Strength Is the Foundation

If you want to build a strong core, you have to actually train for strength.

That means challenging your muscles to produce and control force. It means working through different positions, resisting movement, maintaining stability and learning how to engage your core while the rest of your body moves.

That's one of the reasons I love Pilates-inspired strength training.

You're not just doing crunches until your abs burn. You're asking your core to stabilize while your arms and legs move, control resistance and maintain alignment as your muscles fatigue.

And over time, you get stronger.

That's the foundation.

But What If You Want Visible Abs?

Then we need to have a different conversation.

Because if visible abs are one of your goals, nutrition matters.

You can have incredibly strong abdominal muscles and not see them. Building muscle and revealing muscle are two different things.

Your overall nutrition, energy intake, protein intake, body composition, genetics and hormones all play a role in what becomes visible.That's why we can't talk about changing your body without talking about what you're doing outside of the studio, too.

Training is one piece.

Nutrition is another.

So are sleep, hydration and recovery.

And no, that doesn't mean you need to eat as little as possible or live on salads to get a flatter stomach. In fact, if you're consistently under-fueling your body while asking it to train hard, you're making it much harder to recover, build muscle and perform well.

You don't just need to train your body. You need to support it.

What I Actually Want You to Get From Core Training

In a perfect world, all bodies would be celebrated…but as a woman knows…that’s rarely what we are sold. But at Core (LP) we care so much more about what your core allows you to do long-term.

• Has your balance improved

• Can you control movements that used to feel impossible.

• Can you rotate with more confidence.

• Does your posture feel different.

• Can you carry your kid without wrecking your back.

• Can you feel stronger when you run.

• Can you can pick something up without thinking twice about it.

And if you eventually look in the mirror and notice more definition through your midsection?

Hell yes. Celebrate that.

There's absolutely nothing wrong with wanting to change how your body looks.

But let's stop pretending that's the only reason to build a strong core.

Your body doesn't owe you a flat stomach in exchange for taking care of it.

Build the strength first. The aesthetic can be part of the goal — but it should never be the entire point.

We are Core (LP). With two locations in Berkley + Rochester Hills, MI. Our Pilates-inspired strength training combines controlled movement, resistance, time under tension and intentional muscle fatigue to help you build strength throughout your entire body — including the muscles that make up your core. Our small group classes are capped at 8–12 people so our coaches can actually see you move, offer form corrections, and give you modifications or advancements based on where you are in your training. You can find us at both Core (LP) Berkley and Core (LP) Rochester Hills, with group training, private training, semi-private, and nutrition support available at both studios. To get started, talk with a coach today at your FREE New Client Consult and build a plan that fits your goals and your life.