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My personal journey into the world of posture and deep muscles

By Eyal Rosenfeld · July 17, 2026

The moment I discovered that the body is much more than strength

When I was a young physiotherapy student, I attended a posture course where I was asked to stand in front of the class as a model.

At first, everyone looked at me and there were no particular comments. But after taking a closer look, the instructor said:

"You have increased lumbar lordosis — an exaggerated curve in the lower back, knee hyperextension, rounded shoulders, and a slightly forward head posture."

I listened, but honestly, I didn’t really understand what these terms meant.

Then he added something that surprised me:

"There may be weakness in your deep muscles."

I was surprised. At that time, I was a combat fitness instructor. I was very strong, had always excelled in sports, and felt that I knew my body well.

"But I’m strong," I thought to myself.

Then he explained:

"I’m not talking about the outer muscles that you can see and feel. I’m talking about the deep muscles — the ones responsible for organization, stability, and refined control of movement."

"How do you strengthen them?" I asked.

"Pilates," he answered.

And so, alongside my physiotherapy studies, I began studying Pilates and was introduced to a completely new world.

A world where:

It’s not only about more repetitions — it’s about more precision. It’s not only about more strength — it’s about more awareness. It’s not only about increasing movement — it’s about learning to control it. It’s about finding better organization of the pelvis and spine, allowing the body to create stability from within.

Later, as a physiotherapist and Pilates instructor, I worked with hundreds of people — patients and clients — and repeatedly saw the same pattern: imbalances around the pelvis, lower back, and the ability to achieve deep control during movement.

That was the beginning of my journey toward understanding that the body is not simply a collection of strong and weak muscles.

It is an integrated system that needs to learn how to work together.

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