Eight years of experience in New York's top fitness clubs 🇺🇸
Now in Slovenia 🇸🇮
International Clients Are Welcome! 🌍
Fitness has no borders, and neither do I! My first spoken language is English, but I am also fluent in Slovene, so I can easily coach clients in both languages. Whether you’re a local or a foreigner living in Slovenia, I’m here to help you reach your goals in a way that feels comfortable and accessible to you.

Eight years of experience in New York's top fitness clubs 🇺🇸
Now in Slovenia 🇸🇮
International Clients Are Welcome! 🌍
Fitness has no borders, and neither do I! My first spoken language is English, but I am also fluent in Slovene, so I can easily coach clients in both languages. Whether you’re a local or a foreigner living in Slovenia, I’m here to help you reach your goals in a way that feels comfortable and accessible to you.
TOO BUSY FOR A
HEALTHY LIFESTYLE?
Do you want more energy, fewer extra pounds – without feeling hungry? 🍏💃
Your success can start here with me!
I promise you the right strategy, the right pace, and real results with a personalized approach!
WHY HIRE A PERSONAL TRAINER?

When you invest in yourself and your trainer is waiting for you at the gym, you’re far less likely to skip a workout or slack off than if you were training alone. With a personal trainer, there are fewer excuses and more discipline!
One of the biggest benefits of having a personal trainer is accountability.
Education during workouts is essential for achieving the best results and minimizing the risk of injury. With a well-structured training plan, you’ll efficiently reach your goals while learning proper form for every exercise.As a nutritionist, I also provide professional nutritional guidance to help you optimize your diet for even better results – without strict diets or deprivation! 🥑💪
VIRTUAL ONE/ONE TRAINING
ONLINE
Online coaching is the most flexible, cost-effective, kick-ass way to reach your fitness goals in the known universe. If you want to work out where and when it’s convenient for you – instead of relying on someone else’s location and availability – at the fraction of the cost of in-person fitness training, online coaching could be for you. You can get fit even if your schedule is crazy and your budget is tight.
IN PERSON ONE/ONE TRAINING
IN GYM
If you want a personalized approach, professional guidance, and immediate adjustments to your training based on your needs, personal training is the right choice. With proper technique, a structured program, and the support of a trainer, you will achieve results faster, reduce the risk of injury, and stay consistent and motivated on your journey to better well-being and physical fitness.
KATJA MENDILLO
Hey there! 😊
I’m Katja, a personal trainer with a passion for fitness and health! After spending eight years working in top gyms in New York City , I decided to bring my knowledge and experience back to Slovenia to help people like you become the best version of themselves.
I specialize in helping busy, unmotivated middle aged individuals build lasting healthy habits.
My goal? To show you that with a clear plan, the right knowledge, and proper support, you can overcome excuses and build a strong, healthy, and confident body. I don’t believe in quick fixes – only in consistency and proven strategies that bring real results.
With me, you’ll realize that a healthy lifestyle can be simple and enjoyable. Whether you want more energy, weight loss, or improved fitness – together, we’ll find the path to your success.
- ISSA Certified Personal Trainer
- Trained in top fitness centers across New York
- Co-created new fitness programs in prestigious Manhattan gyms
- Featured in NY Magazine as one of the top 5 female fitness leaders during the pandemic
- Served as one of the main judges at the Hyrox Competition
- Helped hundreds of people lose weight and achieve their fitness goals