Meet Our New Coaches: Marija & David Join Team Arduua
Dear Trail Runners,
We’re growing — and so is our coaching family! 🏔️
We’re beyond excited to introduce two new coaches joining the Arduua team: Marija Kostić from Serbia and David Mora from Spain.
Both are passionate trail runners, certified coaches, and experienced athletes who bring deep knowledge, compassion, and energy into every training session.
Whether you’re working toward your first 10K, preparing for your next ultra, or learning to feel more confident on technical terrain, Marija and David are here to support your journey.
Running Free with Marija Kostić — Arduua’s New Trail Running Coach
At Arduua, we believe coaching is more than just numbers and metrics—it’s about connection, confidence, and creating a deeper relationship with the trail.
That’s why we’re thrilled to welcome Marija Kostić to our coaching team, a passionate mountain runner and down-to-earth motivator who brings both technical knowledge and heart to everything she does.
Running with Purpose: Meet David Mora, Arduua’s New Trail Running Coach
At Arduua, trail running is more than a sport — it’s a way of life rooted in exploration, self-discovery, and mountain spirit.
That’s why we’re thrilled to welcome David Mora to our Coaching Team.
David is not just a coach — he’s a passionate trail runner, a lifelong athlete, and a dedicated guide for those ready to grow stronger on the trail. Based in Madrid and backed by a solid academic foundation in sports science, he brings a rare mix of lived experience, empathy, and evidence-based training methods to the Arduua community.
Whether you’re just starting out or chasing new goals, David’s mission is clear: to help all types of trail runners — not just mountain athletes — build strength, confidence, and joy through purposeful training.
See you on the trails,
Best regards,
Katinka Nyberg – Arduua Founder