David Dunne is the performance nutritionist behind Hexis, the personalised sports-nutrition platform used by World Tour cyclists, Premier League clubs, NBA franchises, Super League sides, and Ryder Cup Team Europe. With a PhD in behaviour change, design thinking, and technology innovation in sports nutrition, and IOC alumnus credentials, he sits at the intersection of academic research and practical application. His work matters because he turned periodised nutrition — matching carb intake to training load day by day — from a coaching idea into a measurable system used by hundreds of elite athletes and tens of thousands of amateurs.
The major positions Dunne is known for in cycling and endurance sport.
Every appearance by David Dunne on The Roadman Cycling Podcast — 1 episode in total.
“Some people are doing 5 hours at an average power of over 300 watts. That amount of power, if we look at that from a kilojoule perspective and then we start to convert that into what the energy cost from a calorie perspective is for individual riders is just so different to what a rider at home can sustain where that absolute energy expenditure is just going to be less.”
“Female athletes will experience it, you know, very often by losing their menstrual cycle. Body will go, I don't have enough energy, this is one of the processes that I can conserve energy on. And again, that's a really unfortunate situation that a lot of female athletes find themselves in, often through misinformation online, maybe bad advice from a coach or trying to adhere to something that they see on social media.”
“Today, you could go out for a 4-hour ride. Your on bike energy expenditure could be 2,000 calories. Tomorrow, you could be at a day of complete rest. So you need to start to understand that your fueling should adjust and your overall nutrition plan and structure should adjust day by day and meal by meal in line with the demands of your activity.”
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