Louis Osselaer
HYROX Elite 15 · Belgian Record Holder · 53:25 Pro
I've never been the naturally strong guy. I came from javelin, tried triathlon until injury stopped me, and spent years in CrossFit fighting for every kilo of strength. Endurance was my gift, strength I had to earn.
In 2022, I entered a HYROX race almost as a side project: one specific session a week, next to my regular CrossFit training. I qualified for the World Championships in Las Vegas and became age group world champion.
That result told me HYROX was my sport. It also fooled me.
Because when I went all-in and set my sights on Elite 15, talent stopped being enough. My running wasn't improving fast enough. I was carrying too much weight. I kept hitting walls.
What changed everything wasn't a new training plan, it was a new focus. I stopped chasing results and started obsessing over the process. I learned to read how my body responds to training. I picked one weakness at a time and worked on it for months. At one point I focused purely on running and dropped strength training completely. And I took full responsibility: if something wasn't working, that was on me. Which meant I could fix it.
Since then: no injuries, steady progress, the fastest HYROX time in Belgium — 53:25 — and racing at the Elite 15 level.
That's what I coach now. Not my talent, you can't buy that, and you don't need it. My process: structure, smart pacing, honest assessment, and one improvement at a time. So you can skip the years I spent figuring it out.
Louis Osselaer
HYROX Elite 15 · Belgian Record Holder · 53:25 Pro
I've never been the naturally strong guy. I came from javelin, tried triathlon until injury stopped me, and spent years in CrossFit fighting for every kilo of strength. Endurance was my gift, strength I had to earn.
In 2022, I entered a HYROX race almost as a side project: one specific session a week, next to my regular CrossFit training. I qualified for the World Championships in Las Vegas and became age group world champion.
That result told me HYROX was my sport. It also fooled me.
Because when I went all-in and set my sights on Elite 15, talent stopped being enough. My running wasn't improving fast enough. I was carrying too much weight. I kept hitting walls.
What changed everything wasn't a new training plan, it was a new focus. I stopped chasing results and started obsessing over the process. I learned to read how my body responds to training. I picked one weakness at a time and worked on it for months. At one point I focused purely on running and dropped strength training completely. And I took full responsibility: if something wasn't working, that was on me. Which meant I could fix it.
Since then: no injuries, steady progress, the fastest HYROX time in Belgium — 53:25 — and racing at the Elite 15 level.
That's what I coach now. Not my talent, you can't buy that, and you don't need it. My process: structure, smart pacing, honest assessment, and one improvement at a time. So you can skip the years I spent figuring it out.
Emile Mattheeuws
Emile has been passionate about sport and movement from a young age. Before entering fitness racing, he competed at a high level in Moto Trial, becoming a multiple-time Belgian and Dutch champion. Years of competing taught him discipline, patience, and the value of consistent work over long periods of time.
His coaching philosophy is built around accessibility, communication, and creating an environment where athletes feel supported throughout their journey. Emile believes that progress happens when athletes enjoy the process and build confidence through consistent training.
One of Emile’s biggest strengths as a coach is his ability to connect with people. He is approachable, empathetic, and genuinely invested in helping athletes move forward. Rather than simply delivering a training plan, he focuses on building a coaching relationship where athletes feel heard, supported, and motivated.
Emile works particularly well with beginner and intermediate athletes who are looking for guidance, accountability, and regular contact with their coach. Whether the goal is completing a first race, building confidence in training, or becoming more competitive, he enjoys helping athletes take the next step in their development.
His background in elite sport combined with his people-first coaching style makes him a coach who not only helps athletes improve performance, but also enjoy the journey that comes with it.
Emile Mattheeuws
Emile has been passionate about sport and movement from a young age. Before entering fitness racing, he competed at a high level in Moto Trial, becoming a multiple-time Belgian and Dutch champion. Years of competing taught him discipline, patience, and the value of consistent work over long periods of time.
His coaching philosophy is built around accessibility, communication, and creating an environment where athletes feel supported throughout their journey. Emile believes that progress happens when athletes enjoy the process and build confidence through consistent training.
One of Emile’s biggest strengths as a coach is his ability to connect with people. He is approachable, empathetic, and genuinely invested in helping athletes move forward. Rather than simply delivering a training plan, he focuses on building a coaching relationship where athletes feel heard, supported, and motivated.
Emile works particularly well with beginner and intermediate athletes who are looking for guidance, accountability, and regular contact with their coach. Whether the goal is completing a first race, building confidence in training, or becoming more competitive, he enjoys helping athletes take the next step in their development.
His background in elite sport combined with his people-first coaching style makes him a coach who not only helps athletes improve performance, but also enjoy the journey that comes with it.
Aaron Timmerman
Marathoner & ultra-runner turned hybrid athlete · HYROX 58:21
I used to look fit without being fit. After a year of training almost only with weights, two flights of stairs at work left me out of breath at the top. That was the moment it clicked: looking strong and being capable aren't the same thing.
So I started running and went straight for a goal that scared me, a full marathon. Over the years that grew into several marathons and ultras (55K, 65K, and a 100K), building up to 80–120 kilometers a week at my peak.
That stairs moment shaped how I coach: don't trust how it looks, measure how it actually performs. I've always trained by data — zones, heart rate, recovery — not out of obsession, but because measuring gives you information, and information gives you confidence you're doing the right things.
HYROX pulled me in slowly. I resisted at first, but when Achilles trouble made it clear I couldn't keep piling on marathon miles, it became the perfect move: less running volume, still training hard, still racing and a new challenge of racing on feel instead of from a spreadsheet.
What I care about most is what happens after the coaching stops. One athlete lost 12 kilograms with me, then I ran into her recently and she'd lost another 3 on her own, still training, still using the habits, because she'd learned the system rather than just following a plan.
That's the goal: not to hand you a result, but to leave you with the knowledge, habits, and confidence to keep going without me.
Aaron Timmerman
Marathoner & ultra-runner turned hybrid athlete · HYROX 58:21
I used to look fit without being fit. After a year of training almost only with weights, two flights of stairs at work left me out of breath at the top. That was the moment it clicked: looking strong and being capable aren't the same thing.
So I started running and went straight for a goal that scared me, a full marathon. Over the years that grew into several marathons and ultras (55K, 65K, and a 100K), building up to 80–120 kilometers a week at my peak.
That stairs moment shaped how I coach: don't trust how it looks, measure how it actually performs. I've always trained by data — zones, heart rate, recovery — not out of obsession, but because measuring gives you information, and information gives you confidence you're doing the right things.
HYROX pulled me in slowly. I resisted at first, but when Achilles trouble made it clear I couldn't keep piling on marathon miles, it became the perfect move: less running volume, still training hard, still racing and a new challenge of racing on feel instead of from a spreadsheet.
What I care about most is what happens after the coaching stops. One athlete lost 12 kilograms with me, then I ran into her recently and she'd lost another 3 on her own, still training, still using the habits, because she'd learned the system rather than just following a plan.
That's the goal: not to hand you a result, but to leave you with the knowledge, habits, and confidence to keep going without me.
