Hi, I’m Marta — founder of CORE
Also known as Grumpy Jogger :)
I created CORE to help women build stronger, healthier bodies from the inside out.
After more than 15 years working and learning in the health and fitness industry, I've seen how much more there is to health than following a workout plan or eating better. I've also experienced firsthand how frustrating it can be when your body doesn't feel the way you want it to, or when the things you know you should do don't seem to fit into your life.
CORE brings together nutrition and digestive health, core strength, movement, and everyday habits to help women understand their bodies, make informed choices, and put what they learn into practice.
My aim is simple: to share the knowledge, tools, and experience I've built over the years so you can spend less time guessing and more time working toward a body that feels stronger, healthier, and more capable.
Outside of coaching, I'm a runner, traveler, bookworm, photographer,
annoying wife, animal lover, and proud mom of four kitties. 🐾
My favorite food? Pizza, obviously. 🍕😁
You can also find my traveling alter ego at Grumpy Nomad Cat,
where I help you plan less and travel better.
WHY I CREATED CORE
Because knowing what to do is only part of the picture.
Over the years, I've seen people try stricter diets, harder workouts, and increasingly complicated routines in the hope of finally getting the results they want.
But health isn't just about knowing which exercises to do or which foods to eat. It's also about understanding what your body needs, how different aspects of health affect one another, and how to make the right choices work in your everyday life.
I've spent years learning about movement, fitness, nutrition, and lifestyle—and figuring out how to bring those pieces together.
That's why CORE isn't just about exercise, nutrition, or habits in isolation.
It's about understanding the bigger picture and learning how to put it into practice.
CORE helps you build a stronger, healthier body from the inside out—through better-informed choices, purposeful movement, and practical changes that fit your life.
THE STORY BEHIND CORE
IS STARTED WITH MY OWN BODY.
I was born with hyperlordosis, which contributed to back issues and introduced me to physiotherapy and Pilates at an early age. That early experience sparked an interest in movement, posture, and understanding how the body works.
Later, my own digestive problems, bloating, eczema, and periods of low energy pushed me to look beyond exercise and explore the relationship between nutrition, gut health, and overall well-being.
Alongside my professional work, I've experienced the frustration of starting over with fitness, struggling to maintain routines while traveling, and trying to do too much at once. I've also dealt with weight changes, feeling disconnected from my body, and the pressure to get everything right.
Moving across the world added another layer: rebuilding routines and adapting to a life where schedules and circumstances don't always stay predictable.
These experiences didn't give me all the answers. They gave me reasons to keep learning, question what wasn't working, and look for approaches I could actually apply.
WHAT I LEARNED ALONG THE WAY
I stopped treating every setback as a reason to start over.
Instead, I began paying more attention to what I needed, how I responded to different approaches, and what made it easier to look after myself over time.
I learned that:
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Exercise needs to match your current abilities and goals.
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Nutrition is about more than following a list of foods to eat or avoid.
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Sleep, stress, and recovery matter alongside training and food more than we usually acknowledge.
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A routine needs to adapt when work, travel, or life gets in the way.
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Understanding your body is more useful than constantly chasing the next plan.
I returned to running and training, developed routines that work better around my life, and found ways to approach my health with more understanding and less guesswork.
I still adapt. Life still changes. The difference is that I no longer expect every week to look the same.
That experience influences how I work with clients: start where you are, understand what matters, and build from there.
WHY THE NAME CORE?
STRONG FROM THE INSIDE OUT.
The name has a personal meaning for me.
My early experiences with back issues led me to core strength, posture, and Pilates. My later experiences with digestive health broadened my interest in what happens inside the body and how it connects with the way we feel and function.
Over time, CORE came to represent both sides of health: the strength we build through movement and the internal health we support through nutrition and everyday choices.
Neither exists in isolation. How you move, eat, sleep, recover, and live all contribute to the bigger picture.
That's why CORE brings together three connected areas:
Nutrition & Gut Health
So you can understand your eating patterns, support digestive health, and make more informed choices about what works for your body.
Core Strength & Fitness
To build strength, improve movement and posture, and develop the fitness to do more of what you enjoy.
Habits & Lifestyle
To help you find practical ways to make movement, nutrition, and self-care fit into real life—even when your schedule changes.
Together, these areas form the foundation of CORE and the five-stage CORE Method.
WHAT CORE STANDS FOR
I don't believe you need to follow a perfect routine or keep starting from scratch to make progress.
You need to understand your starting point, know what deserves your attention, and have practical ways to put that knowledge into action.
That's what I've built CORE to help you do.
Whether you're working on your core strength, trying to understand digestive discomfort, improving your fitness, or figuring out how to look after yourself through a busy and changing life, CORE gives you a way to bring those pieces together.
You can explore the CORE Method, work through a program at your own pace, or choose personalized coaching if you want more individual support.
You don't have to figure everything out at once. You just need a place to start.
Want to know more about my experience and credentials?
