For nearly twenty years, I have studied, modelled and analysed complex systems.
My journey, both scientific and professional, has always been guided by a single question:
How do you understand the behaviour of a system made up of many variables that interact constantly?
A planet's atmosphere is a complex system. A human heart is a complex system. The global economy is a complex system. And an athlete is just as much one.
What fascinates me is not only observing these systems, but understanding the mechanisms that govern them, the interactions that connect them and the dynamics that explain how they evolve.
I am an engineering physicist and a Doctor of Engineering Sciences from the University of Liège. My career has led me to work in fields that seem far removed from one another.
I first took part in work modelling the dynamics of the atmosphere of the planet Venus. I then completed a doctorate devoted to the numerical modelling of how the human heart works, in order to study certain mechanisms involved in cardiac rhythm disorders. I later spent more than a decade developing advanced models designed to represent the economic and financial environment within one of the largest insurance groups in Europe.
At first glance, these fields have nothing in common. Yet they all rest on the same foundations: understanding multidimensional systems, identifying the interactions between their components and building models capable of representing a complex reality.
Throughout this period, I learned that it is often impossible to understand a system by observing its elements in isolation. It is the interactions between these elements that produce the most important behaviours.
I also discovered that innovation frequently arises at the boundaries between disciplines. The most powerful ideas often emerge when we dare to transfer concepts, methods or ways of thinking from one field to another. This ability to build bridges between different disciplines is today one of the foundations of my approach.
The rest reads by theme. Open the ones that speak to you : from decision-making under uncertainty to the athlete's digital twin, each lights up a facet of how I work.
Over the course of my career, I also had the opportunity to lead a team of modelling specialists on strategic issues for the group. This experience profoundly enriched the way I approach complex problems.
Scientific research had taught me to understand systems. Management and responsibility taught me to make decisions in environments where not all the information is ever available, where uncertainty is everywhere and where the stakes are very real.
I thus operated daily in contexts where I had to analyse multidimensional situations, integrate information that was sometimes incomplete or contradictory, build a coherent vision and then turn that analysis into concrete decisions. This experience also allowed me to collaborate with extremely qualified people, to confront differing points of view and to gauge the richness that collective intelligence can bring when it is put to the service of a shared goal.
Science helps to inform decisions. It never fully removes uncertainty. The challenge is then to make the best possible decisions with the available knowledge, while remaining ready to question your assumptions when new information appears.
Beyond my scientific and professional path, there is another constant in my life: sport. I have always been passionate about sport and convinced that movement is an integral part of human nature.
This passion naturally led me to deepen my knowledge in the field of performance and training sciences, notably through the Certified Performance and Sport Scientist (CPSS) certification awarded by the National Strength and Conditioning Association.
For me, sport is a unique field of exploration, at the meeting point of two worlds that fascinate me deeply: performance and science. Performance, because it embodies progression, learning, adaptation and the human capacity to gradually push back one's limits. Science, because it helps us understand the mechanisms behind that progression.
But what makes this field so exciting is precisely the fact that not everything is yet understood. Contrary to what one might think, the goal of science is not to make questions disappear: it is to bring new ones to light. The more we understand how the human body works, the more we discover the richness and complexity of the interactions that govern it.
Observing, forming hypotheses, testing, learning and gradually building one's understanding of a complex system is a process I have always found fascinating. Every answer opens new perspectives, every discovery reveals new questions.
This vision guides my approach to sporting performance today. I see the athlete as a living, dynamic system rather than as a mere collection of metrics or reference values.
My goal is not only to measure: it is to understand. To understand how each athlete produces their performance, the mechanisms that limit it, how their body responds to the various training stresses and how their physiological and metabolic characteristics influence their progression. And above all, to understand how all these dimensions interact with one another.
I am convinced that every athlete has a physiological and metabolic signature of their own. Approaches based on population averages or on generalised statistical estimates can provide useful indications, but they never describe an individual perfectly. That is why I favour an approach grounded in measurement, rigorous scientific analysis and individualisation.
Physiological and metabolic profiling is today the cornerstone of this approach. It makes it possible to build a fine-grained understanding of how each athlete functions and to place the individual at the centre of decisions.
But this vision goes further. My ambition is to gradually develop models capable of representing how the athlete functions ever more faithfully, integrating the many dimensions that influence their performance and, ultimately, contributing to the construction of a genuine digital twin of the athlete. In other words, to apply to sporting performance the same principles of modelling, analysis and understanding of complex systems that have guided my entire scientific and professional journey.
Because in the end, whether you study a planet's atmosphere, the workings of the human heart, the global economy or sporting performance, the question remains fundamentally the same:
How can you understand a complex system well enough to act on it in a meaningful way?
This is the question that has always fascinated me. And it is this passion that today guides my work with athletes.
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