Engineer’s Mind. Coach’s Heart.
Don Heatrick | Muay Thai Performance Coach | Founder, Heatrick Muay Thai Performance
The Background
For 18 years I was a mechanical design engineer. For a significant part of that time, I was also a competing fighter. The two ran in parallel, and the thinking from one kept bleeding into the other.
I didn’t start competing in Muay Thai until I was 32, and I walked in with no coach, no corner team, and no ringcraft. Within a year I had won three area titles at three different weights. I went on to represent England at the Muay Thai World Championships in Bangkok, drew with the defending two-time world champion from Russia, became European silver medallist, and was ranked UK number four as a professional at 40, competing against athletes half my age. I retired because of an injury.
That story is about applying the right framework to the right problem.
A machine fails because of a specific fault. Athletes stall for exactly the same reason. When I stopped trying to train harder and started diagnosing where the actual limitation was, everything changed. The engineering logic had been sitting there the whole time. I just had to apply it.
I was invited by the Yokkao Training Centre in Bangkok to work directly with their elite fight team. I have coached celebrated fighters including Liam Harrison, supporting his return from serious injury to a knockout victory. Coaching since 2000 and full time since 2009, I have worked with 1,000+ athletes across 95+ countries, from world champions to passionate beginners.
I founded Heatrick Muay Thai Performance on a single conviction. Most athletes are held back by the wrong effort, applied to the wrong place, at the wrong time.
1,000+ fighters trained
95+ countries worldwide
How I Work
Most coaches prescribe more rounds, more volume, and more sessions. When results stall, the instinct is to add.
I do the opposite. I find the bottleneck.
Performance is limited by constraints. Remove the right one and everything downstream improves. Add volume on top of an unresolved constraint and you get fatigue instead of progress.
These are the frameworks I use:
Constraint Removal
Performance is limited by bottlenecks. Identify the single limiting factor and address it directly. Everything else is noise until that constraint is resolved.
Minimal Effective Dose
The smallest intervention that solves the constraint. The one that works, applied precisely, preserving the recovery and consistency needed for what comes next.
The Black Box Protocol
When something goes wrong in engineering, you don’t blame the machine. You analyse the fault systematically, identify the cause, and correct it. I apply the same logic to performance failures. A clear, structured path forward.
The OODA Loop
Observe, Orient, Decide, Act. The continuous feedback cycle that separates reactive performance from proactive performance. Applied to in-fight strategy, to training diagnostics, and to any competitive environment where conditions change faster than a fixed plan can account for.
The Design-Brief Approach
Every training block should answer one question: what is the objective, and is this actually contributing to it? If you can’t justify it, cut it. This keeps the work honest and the athlete progressing.
Who I Work With
Fighters
If you’re serious about Muay Thai performance and willing to train smart rather than just train hard, we’ll get on. I work with fighters at every level, from first-year beginners learning to build a solid foundation to experienced competitors preparing for title fights. What I ask for is a willingness to question what you’re doing and why.
Coaches
If you’re a Muay Thai coach looking to sharpen your programming, your fighter diagnostics, or your own understanding of how performance actually works, I can help with that too. I’ve been coaching since 2000. I’ve made most of the mistakes already. You don’t need to repeat them.
Organisations and Professionals
The frameworks I use in the gym translate. Constraint Removal, the Black Box Protocol, the OODA Loop, all these are performance principles that happen to be proven in one of the most demanding competitive environments on earth. If you’re looking for a speaker, a facilitator, or a consultant who can bring that thinking to your team or your event, get in touch.
I use AI tools behind the scenes as a research partner, a drafting assistant, and an assistant coach built on my own protocols. Every framework and every judgement call is still mine. Every word is too. The full breakdown of how I use these tools is here: How I Use AI
