About me

Experience shaped how I coach.

I started training because I lacked confidence. Training for strength hooked me. Years on the gym floor, in club management and in continued education taught me where results actually come from: clear assessment, solid foundations and well-chosen steps, repeated.

Thomas Devresse in the gym

The path behind the method

The method grew through training, coaching and continued learning.

A more muscular physique was never the first goal—it came as a side effect of chasing performance: a 207.5 kg squat, 240 kg deadlift and 137.5 kg bench press. What kept me moving forward was wanting to see what my body was capable of—and I’m not done yet. That process of self-improvement has become part of who I am.

Thomas in 2010, before training became part of his life
2010Before training became part of my life.
Thomas in 2019
2019Working on the gym floor and training for strength.
Thomas in 2024
2024A shift toward longevity changed how I trained and what I valued.
Thomas in 2026
2026Progress pursued with more patience and precision.

Over time, longevity and precision became as important as the numbers. This is the perspective behind how I coach: assess clearly, progress deliberately and adjust when the evidence asks for it.

From the gym floor

Coaching was the original plan. Management made me better prepared for it.

My first job at Decathlon sparked my interest. I started training in a gym in 2015 and completed my first Personal Training qualification in 2018.

Management was a chapter I chose, and it made me a better coach: daily contact with a broad range of members, trainers and class instructors taught me how differently people approach change—and how to meet each of them where they are.

  1. Fitness Coach · Jims

    Front desk and fitness-floor work, with the intention of building a PT practice alongside it.

  2. Club Manager · Jims Meiser

    Team development, member conversations and responsibility for the day-to-day reality of a busy fitness club.

  3. A shoulder injury changed my approach

    A persistent shoulder injury, despite extensive professional consultation, pushed me to study movement and load management more deeply. The Rehab-U certification changed how I train and coach: smarter exercise selection, more prevention, and a better way of managing and working around injuries within a trainer's scope.

  4. Independent PT · Part time

    I began coaching clients alongside full-time club management.

  5. Independent PT · Full time

    I left management to make coaching, education and program design the main work.

Thomas coaching a client in Brussels

Why I coach this way

Assessment before programming. Foundations before intensity.

Trying to move too fast without solid foundations can send progress backwards. Better assessment, appropriate exercise selection and honest re-assessment make training decisions clearer and reduce avoidable detours.

Kaizen gives that process its rhythm: small improvements, repeated consistently, without rushing faster than you can adapt. The work compounds over time.

“The journey of a thousand miles begins with a single step.”

Lao Tzu

Management also strengthened my interest in teaching. I do not want clients to follow instructions blindly. I want them to understand what we are doing, why it matters and how to make better decisions over time.

Selected education

The qualifications behind the method.

Each certification has its purpose: assessment, program design, strength, hypertrophy, nutrition. Alongside these, workshops and focused courses keep the toolbox sharp—sport and lower-back pathologies and kettlebell (Fitness Education, 2020), ‘Le Programme’ (Olivier Bolliet, 2021) and The Barbell Training Course (Thibarmy, 2024).

EREPS Level 4 · Personal TrainerAll-in Fitness · 2018
Recertified with PCA · 2020
Sport Performance SpecialistPCA · 2022–2025 · Bundle: Program Design (2022), Assess & Correct (2023) + Olympic lifting, modified strongman, kettlebell and lower-back workshops
Movement Optimization for Prehab & Performance · Levels 1–2Rehab-U · 2022 · With Mobility Fundamentals
Strength Systems International · Levels 1–3Clean Health · 2023
Performance Nutrition Coach · Levels 1–2Clean Health · 2022
Certified Nutrition CoachNASM · 2026
Hypertrophy CornerstoneThibarmy · 2023
Program in HypertrophyPCA · 2025
Currently completingPerformance Nutrition Coach Lvl 3 · Clean Health
Neurotyping 1–3 · Thibarmy
Omni-Contractions Training Systems · Thibarmy

The work now

I help committed people build a body—and a way of training—that can last.

That may mean a major physique transformation. It may mean getting stronger, refining technique or learning to enjoy training enough to stay with it for years.

Tell me where you are starting