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 the founder and CEO of the Deadly Dozen, one of the fastest-growing fitness races in the world, expanding to over 20 countries within just 18 months of launch. Building on this explosive growth, Jason opened the Deadly Dozen Institute of Fitness Racing, a pioneering global hub for training, education, research, and innovation designed to shape the future of the sport. The Institute develops world-class training systems, certifies coaches, and drives the evolution of fitness racing to build the next generation of hybrid athletes.

A former British Army Physical Training Instructor, bestselling author of more than twenty books, and one of the UK’s leading strength and conditioning coaches, Jason owned and operated a thriving strength & conditioning gym for over a decade, coaching hundreds of athletes every week. He is also the founder of the SCC Academy, which has educated and certified over 40,000 fitness professionals and enthusiasts worldwide.

Through the Deadly Dozen, the Institute of Fitness Racing, the SCC Academy, and his weekly Podcast, Jason’s mission is to make fitness racing the most accessible, physically rewarding, and transformative sport on the planet; uniting communities, redefining competition, and empowering millions to train, race, and embrace effort—a philosophy he calls Effortism.

Follow Jason on Instagram: @Jason.Curtis.Official

https://www.jasoncurtis.com
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