Nutrition for Ironman & 70.3 Triathletes Who Want to Perform at Their Best
Evidence-based nutrition coaching from a Registered Sport Nutritionist, designed to help long-distance triathletes fuel their training and racing and unlock their best performance yet.
Supporting 100+ amateur and professional triathletes, from first 70.3 to pro Ironman racing — with 2.5M+ views on YouTube
Since we started working together, Lizzie has moved from 180th to 25th in the world.
"James helped me tailor my nutrition for training and racing.
I could really start pushing the upper limits of my intake which made a huge difference to my performances."
- Lizzie Rayner, professional triathlete
Multiple 70.3 Champion and 8th place in 70.3 Pro World Championships
Support for every stage of your 70.3 & Ironman journey
A cohort programme and nutrition community for triathletes who want expert guidance, a clear framework, and the support of others training for 70.3 and Ironman.
A fully customised nutrition programme triathletes who want direct, high-level support from James. Every plan is fully tailored to you.
Hey! I’m James.
My first 70.3 taught me something brutal: fitness doesn’t matter if your nutrition falls apart.
Mine did (spectacularly) and it sent me down a rabbit hole to understand what actually works for triathletes.
Nutrition Triathlon grew out of that obsession — part education, part experiment, part community. I’ve since completed a Masters in Sport & Exercise Nutrition, became a Registered Nutritionist with SENR, and spent over a decade in healthcare. The mission has stayed simple:
Help 70.3 and Ironman athletes take the guesswork out of nutrition.
Over the years I’ve worked with hundreds of age-groupers and professionals who were stuck with the same problems: fading on the run, gut issues, confusing carb targets, or trying to lose weight without wrecking training. Seeing athletes finally race with stable energy and real confidence is what keeps me doing this.
Everything you’ll find here is built for long-course triathletes balancing big goals with real lives.
If that sounds like you, you’re in the right place.
What People Are Saying
“James has the rare ability to break down complex (and sometimes confusing) info and make it actionable. For the first time, I understood how to secure a safe sodium intake, how to carb load and eat in a way that doesn't upset my stomach, and how to conquer my races with energy.”
- Giovanni Angelo Tertulli
“James's advice and nutrition plan has been invaluable during my lead up to and completing my full Ironman this year.
The race plan was first class and worked to perfection on the day!”
- Lesley Yates
“James has been brilliant, helping me to tune my Nutrition strategy. It has been particularly useful in setting solid goals and strategies to make the most of my training - whilst getting to a sensible race weight..”
- William Tregurtha