Strength isn't just built.

It's learned.

Marina Tkalčić holding two kettlebells during a strength coaching session.
Marina Tkalčić, StrongFirst Elite Instructor and founder of Strength Studio Marina.

Evidence-based strength coaching for women who want to build muscle, confidence and long-term health.

Strength Studio Marina provides personalised coaching for women who want to become stronger, move with confidence and build a body that supports them throughout life.

Through evidence-based strength training, you'll learn how to train safely, understand why you're training, and develop strength that extends beyond the gym.

Private coaching is available in Rijeka and the surrounding area, at your home, and online.

Explore Coaching
A person in workout clothes, holding a dumbbell in a dark gym environment, with a row of dumbbells visible on a rack.

Training with purpose—not just exercise.

Many women begin exercising with the goal of losing weight or changing the way they look. Those goals are perfectly valid—but lasting progress rarely comes from chasing appearance alone.

At Strength Studio Marina, strength is the method, not the final goal.

Learning how to move well, becoming physically capable, building muscle, improving long-term health and understanding your own body are investments that continue to benefit you long after individual training sessions are over.

My role is not simply to tell you what exercises to perform. It is to help you understand the process, build confidence in your abilities and develop training habits you can sustain for years.

Choose the coaching format that fits your life.

Marina Tkalčić coaching a woman during a strength training session

Private Coaching

Individual in-person coaching focused on learning technique, building strength and progressing safely with a programme designed specifically for you.

Marina Tkalčić, StrongFirst Elite Instructor and founder of Strength Studio Marina

Expert Consultations

Need guidance without regular personal training?

Technique reviews, consultations and ongoing support are available.

Personal strength coaching session in Rijeka

Online strength coaching

Structured programming, regular communication and personalised guidance wherever you live.

Marina Tkalčić, StrongFirst Elite Instructor and founder of Strength Studio Marina

At-home Coaching

Personal training in the comfort of your own home for clients in Rijeka and the surrounding area.

There is no single programme that works equally well for every woman.

Your training should take into account your current abilities, previous experience, available equipment, lifestyle, goals and the amount of time you can realistically dedicate to it.

That is why my coaching is built around the individual.

Marina Tkalčić, StrongFirst Elite Instructor and founder of Strength Studio Marina.

Meet Marina

Before becoming a fitness coach, I studied people.

My academic background is in Ethnology and Cultural Anthropology, where I explored how culture, beliefs and everyday habits shape the way we live. Today, I bring that same curiosity into coaching.

I believe successful training isn't built only on good exercises. It's built on understanding the individual standing in front of you.

As a StrongFirst Elite Instructor, I combine evidence-based strength training with thoughtful coaching, helping women build not only stronger bodies but also greater confidence in what those bodies can do.

Read my story
A person in a green shirt and black leggings bending over, lifting a dumbbell in a gym or fitness setting with black equipment and lighting.

What you can expect

Individual approach

Your programme is designed around your goals, experience and lifestyle—not copied from a template.

Education

You'll understand why you're doing each exercise, not simply follow instructions.

Evidence-informed coaching

Training decisions are guided by current evidence, practical coaching experience and continuous professional education.

Technique first

Learning to move well comes before lifting more weight.

Long-term thinking

The goal is sustainable progress that supports your health for years—not quick fixes.

Questions, adjustments and feedback are part of the coaching process, because progress rarely happens in a straight line.

Ongoing support

strength in their own words

“Their attention to detail and commitment to quality truly stood out. We’ve already recommended them to others.”

— Former Customer

“Communication was top-notch and the final outcome was even better than we imagined. A great experience all around.”

— Former Customer

“Every detail was thoughtfully executed. We're thrilled with the outcome.”

— Former Customer

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