Arj Thiruchelvam Start a partnership
Arj walking alone down an empty athletics track, black and white
Arj training through the snow as a decathlete
The decathlon years
About Arj

Elite isn’t a level. It’s a standard.

After years training alongside national and international athletes, in 2012 I joined my friend Phil on the DreamDecathlon Project, chasing Rio 2016. Within 18 months a ruptured Achilles ended it, and I never made it back.

It taught me what elite really means: taking a human, individual approach, managing load, respecting each athlete’s tolerance and testing instead of guessing.

I never wanted anyone else to lose their dream the way I did. Now I help athletes at every level reach their goals and return to sport after injury, and I share what I’ve learned on BBC radio, on stage and in print.

Philosophy

Assess, don’t guess

Assess

Every plan starts with testing, not assumptions. The data decides the training.

Individualise

The science is the same at every level. How it’s applied to each athlete is the coaching.

Explain

Athletes should know why they’re doing every session. Understanding is what makes it stick.

Credentials

Qualified, published, on air

  • BSc (Hons) Applied Sports Science, Loughborough University
  • UKA Level 2 coach and MNU nutrition certified
  • Lecturer in sports science in higher education for over 5 years
  • Co-designed two sports science degrees for Oxford Brookes University
  • National Running Show Coach of the Year finalist, 2024 and 2025
  • Founder and head coach, Performance Physique, since 2014
  • Chair, Performance Physique Athletics Club (England Athletics affiliated)
  • Author, Strength and Conditioning for Teenagers (Bloomsbury Sport, 2026)

Work with Arj

Partnerships, speaking or media. Coaching is through Performance Physique.

Get in touch
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