Double UTMB Winning Nutritionist and Sports Scientist.
I help ultra and endurance athletes, teams and organisations improve performance through applied sports science, performance nutrition, physiological testing, data analysis, race strategy, and research. I use a holistic scientific approach, as the reason an athlete underperforms is rarely down to one thing. My aim is to use research, science, data, and applied practice to take the performance of endurance and ultra-endurance athletes to the next level.
Paul Booth
Integrated Performance Science and Nutrition for Elite athletes, teams and organisations
Athletes I work with have won UTMB, CCC, OCC, Western States, and other top positions in races globally. Ten years of applied practice sit behind that, including work with world-class and elite ultra runners and teams. In 2025, I was the sports scientist and nutritionist to both the men's and women's UTMB champions. My PhD research investigates metabolism and performance in ultra-runners, so my advice is built on evidence rather than trends. Over the past 20 years, I've also completed 94 ultramarathons, giving me a rich source of research and testing. I work one-to-one with individual athletes, teams, and organisations on performance strategy, testing programmes, education, workshops and training camps.
work with me
The Unlocking Performance Podcast
Did I mention we have Podcast? From MNSTRY Nutrition, as a team of researchers, we discuss the science behind performance and nutrition, with a different topic every month.
Who am i?
I’m Paul. I’m a qualified Sports and Performance Nutritionist, Exercise Physiologist, Academic, and PhD Researcher in Ultra-Endurance Metabolism, Physiology and Performance. I’ve been trail and ultra running for over two decades. Recently (August 2026), I completed my 94th ultramarathon at UTMB OCC. I’ve competed in races such as UTMB, PTL, Ironman, road marathons, fell and trail races, long-distance challenges such as the Bob Graham Round, bikepacking races, and alpine fastpacking expeditions.
Professionally, I’m a ultra-endurance researcher, co-host on the Unlocking Performance Podcast, and have previously worked as a consultant for the Salomon International Team and Kailas Fuga. I have contributed to articles in publications in magazines such as Velo and Run, appeared on numerous podcasts.
This is me travelling hut-to-hut on the Dolomites Alta Via 2 route.
To find out more about me and the work I do, please follow the link.