From GB Triathlete to Deadly Dozen Contender

Fitness Racing Podcast
Written By Jason Curtis

In this episode of the Deadly Dozen Podcast, elite hybrid athlete and former GB triathlete Calum Upton takes on the Deadly Fitness Test — a brutal uphill-and-downhill challenge that’s exactly half of the legendary Deadly Dozen.

We dive into his athletic journey, from podium finishes in rowing and triathlon to winning elite hybrid races, and his training plan for a potential world record attempt at the Birmingham Deadly Dozen.

Expect deep insights into hybrid fitness training, pacing strategy, strength vs. endurance balance, and the mental side of racing.

Whether you’re a runner, strength athlete, or fitness racer, this conversation will inspire you to set goals, train smarter, and maybe even start your own bucket list.

Topics include:

  • Calum’s athletic background & transition to hybrid racing

  • The brutal reality of the Deadly Fitness Test

  • Strength vs. endurance in fitness racing

  • Training for a world record attempt

  • Mindset, goal setting, and life beyond sport

🎯 Follow Calum’s blog: Medium.com/@Callumupton1345

Jason Curtis

Jason Curtis is a leading strength and conditioning coach, former British Army physical training instructor, and bestselling author of numerous books on health, fitness, and sports performance. Based in the UK, he owns and operates a thriving gym, 5S Fitness, where he coaches athletes from all walks of life.

Jason is the founder of The SCC Academy, which has educated and certified over 35,000 fitness professionals and enthusiasts around the world. He also co-founded the CSPC, a specialist organisation dedicated to advancing the skills of combat sports coaches and athletes.

In the world of competitive fitness, Jason is best known as the founder of the Deadly Dozen—a global phenomenon that has redefined fitness racing, with hundreds of events hosted across multiple countries.

https://www.jasoncurtis.org
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