Two-sport ONE World Champion Regian Eersel rarely loses. It’s been 7 years since he last experience defeat. So, I asked him how he successfully avoids over confidence?

What would he do differently in his training if he could turn back time?

And what are Regian’s two biggest pieces of advice to any fighter wanting to achieve their best?

Regian generously shares insight into what drives a world class fighter, and proves once again that mindset shapes your results.

We wish Regian success in his ONE Lightweight Muay Thai World Title defence on June 9 against Dmitry Menshikov at Lumpinee Stadium!

by Don Heatrick

Guest Links

You can follow Regian Eersel on Instagram @koolhydraat, and follow Sityodtong Amsterdam on Instagram @sityodtongamsterdam

Show notes for this episode with further references and resources below!

Episode Timestamps

  • 00:00 – Intro
  • 01:15 – Regian Eersel, two-sport world champion!
  • 01:34 – From Suriname to Amsterdam
  • 02:22 – Looking up to “global” fighters and loving the discipline
  • 03:48 – 7 years undefeated?
  • 05:00 – Forever an underdog
  • 06:19 – Champions are equal parts self-belief and hard work
  • 07:51 – Time is limited, and we have to make sacrifices
  • 10:26 – How Regian’s training has evolved over time
  • 12:18 – Going back in time? Listen to coaches more!
  • 13:57 – Perspectives of others is important
  • 15:28 – Punching in small gloves
  • 16:58 – Two pieces of advice to be the best you can be
  • 17:51 – Finding the right support; there are 20 people behind me

Don Heatrick

Founder of Heatrick Strength and Conditioning

Don Heatrick is a family man from the UK, former mechanical design engineer, European Muay Thai silver medallist, former pro Thai boxer (ranked 4th in UK while aged 40-years), a Muay Thai coach, podcast host, and the go-to expert on Muay Thai performance training with over 25 years of coaching experience.

Don helps ambitious fighters and coaches take their game to the next level by bridging the gap between Strength & Conditioning, Performance Science, and Muay Thai.

Follow Don Heatrick on Instagram:

Want to help us invest even more in providing free content? …You can donate here


The Science of Building Champions video series
The science of building a Muay Thai champion’s strength & conditioning, which results in…
  • Fastest possible short-term progress
  • Maximum long-term progress
  • More efficient movement patterns
  • Better technique
  • Relentless endurance (never gas out)
  • Reaching athletic potential as quickly and efficiently as possible (without wasting time on things that aren’t worth doing)
  • Free up more time for technical training AND life!
  • The Optimum 12-Week Fight Camp