As a para-triathlete, I was looking for a coach who dared to think outside the box to help me finish Ironmans and Ironman 70.3 races. In my case, that means swimming with one leg, cycling with power from one leg, and wheeling instead of running.
Thanks to the coaching approach of Lionel and Gaby, I always felt closely supported and appreciated how they adapted the training to match my work and personal life.
Through your professional coaching, training methods, and expertise, I’ve made enormous progress—and I continue to improve. This has helped me reach my goals, but more importantly, it allows me to keep enjoying the sport of triathlon.
Edwin De Wolf
Training with Ferrum Endurance for the past years has been a transformative journey. Their expert guidance has not only elevated my physical prowess in triathlon training, but also fortified my mental resilience. What sets them apart is their commitment to finding a personal fit for each and every athlete. They understand that progress isn’t always about pressing the gas pedal; sometimes, it’s about knowing when to slow down. This approach has taught me that slowing down can actually lead to greater overall progress, allowing for recovery and growth. It’s not just about relentless forward motion, but about moving forward in a sustainable and healthy way. As I look towards the future, I am excited to continue exploring my potential and pushing my limits under their exceptional mentorship.
Olivier Peters (Ferrum athlete since February 2022)
Together with Gaby and Lionel, I trained for my first full-distance triathlon: Challenge Roth. I quickly noticed that at Ferrum, it’s about me, the athlete—not just blindly following a schedule or chasing a fast finish time.
Can’t make a training? No problem! Need to completely rearrange the week? They’ve got you. My 1001 questions were always answered quickly and seriously, even the ‘dumb’ ones.
I’m so glad I chose Ferrum and I’m still training here with a big smile on my face!
Joost Koetsier (Ferrum athlete since October 2022)
I’ve only been training with Lionel for five months, but I felt at ease from day one. It feels like the start of a long and meaningful collaboration.
The variety in the training plans keeps each session fresh, engaging, and challenging—which has brought the joy back into training for me. That joy is, and always will be, the most important thing for an amateur triathlete like myself.
What I also value deeply is Lionel’s personal approach. He adjusts schedules quickly when needed, listens closely, and offers thoughtful feedback that encourages me to keep learning and growing.
And both Lionel and Gaby are walking encyclopedias of knowledge—and they share that passion with us through Q&As and webinars, which is incredibly inspiring.
Claudia van der Poel (Ferrum athlete since November 2023)
I’ve been working with Ferrum Endurance since 2019. Over the years, I’ve transitioned from triathlon to ultrarunning, and we’ve learned and achieved so much together.
Their approach to healthy, sustainable training—with a strong focus on mental well-being—has proven to be incredibly effective. They truly look at the person behind the data and adapt training in a way that ensures goals can actually be achieved.
My progress over the past few years has been remarkable. For me, Ferrum is a proven concept. I’m looking forward to what the next years will bring!
Marijn Marchand (Ferrum athlete since 2019)
Before I started training with Ferrum Endurance, I had no idea how to train for a triathlon. So in early 2021, I decided to get coaching from Lionel—and it clicked right away.
Since working with Ferrum, I’ve broken personal records in both running and triathlon events.
The workouts are fun, challenging, and well-structured. Can't do a session? No problem—Lionel quickly provides a new, motivating alternative.
His supportive and enthusiastic approach really pushes me to hit my goals. My next big one is completing a full triathlon—and with Lionel’s training plan, I’m confident I’ll get there!
Sander Cortenraad (Ferrum athlete since January 2021)