About Us

Brand Vision

Kaizen Rugby was founded by Isaac with a clear mission: help rugby players unlock their full potential and achieve their goals.

With a background in playing, coaching, and performance development, Isaac created Kaizen Rugby to give athletes a smarter, more sustainable path to improvement.

Every programme, session, and piece of content is rooted in the Kaizen philosophy - focused on continuous improvement.

We work with players at all levels to improve performance, reduce injury risk, and build resilience that lasts beyond the pitch.

No shortcuts - just real consistent development, one day at a time.

Meet the Team

Isaac Marsh

Founder & Head Coach

I have dedicated my life to rugby, driven by the ambition to build a professional career at the highest level. After making my Premiership debut for Gloucester Rugby, I now play for Hartpury RFC in the English Championship.

That journey is what drives me. As the Founder and Head Coach of Kaizen Rugby, I am on a mission to help others reach their full potential, both on and off the field. Backed by an MSc in Sports Coaching and a Level 3 Personal Training qualification, I bring together elite level experience and evidence based training methods.

Kaizen Rugby is built on the belief in Kaizen, continuous improvement through consistent, deliberate action. My goal is simple, to support and guide players with the structure, coaching, and mindset needed to keep progressing and ultimately achieve their own dreams.

Testimonials

  • "I’ve worked with Isaac a lot - his passion for helping others improve makes him a top choice for aspiring rugby players."

    Louis Rees-Zammit
    1-1 Coaching (In-Person)

  • "Working with Isaac has helped me stay consistent. I’m bigger, stronger and my rugby has improved massively."

    Evan Pavarino
    1-1 Coaching (Online)

  • "I wholeheartedly recommend Isaac to any young rugby player looking to take their game to the next level."

    Sion Hill
    1-1 Coaching (In-Person)

  • “Finding Kaizen Rugby has been a game changer for me, I couldn't recommend Isaac enough.”

    Olly Spence
    1-1 Coaching (In-Person)

  • Far better than any I’ve done before. The personalised programming and regular check ins have made all the difference.

    Thomas Usher
    1-1 Coaching (Online)

  • "Training with Isaac has been great, I currently feel the strongest I have ever felt. I'm excited to keep building!"

    Monique Adcock
    1-1 Coaching (Online)

  • "I’ve been improving week after week since joining the programme. Isaac’s continuous support keeps me accountable."

    Charles Vanlaetem 1-1 Coaching (Online)

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