How Many Carbs Can You Use Per Hour When Cycling? At-Home Test Revealed! (2026)

Are you curious about how many carbs your body can utilize per hour while cycling? This article takes you on a journey as we explore the fascinating world of carbohydrate oxidation testing. Get ready to dive into the science behind fueling your rides and discover the secrets to unlocking your cycling potential. But here's where it gets controversial...

The author embarks on an at-home carbohydrate oxidation test, a cutting-edge approach to understanding their body's fuel efficiency. With a 90-minute treadmill session, they aim to uncover the mysteries of exogenous carbohydrate oxidation, a process that plays a pivotal role in cycling performance. The test, organized by Puresport and ExoAnalytics, offers a unique insight into how athletes can optimize their nutrition for better results.

The science behind the test is intriguing. By measuring the carbon-13 and carbon-12 in the breath, researchers can determine the amount of carbohydrates used for energy. The author, having already consumed gels every 20 minutes during marathon attempts, is eager to understand their body's capacity. The results reveal an exogenous oxidation rate of 56g/hr and an oxidative efficiency of 93%, leaving room for improvement.

But is the 60g benchmark right for everyone? Dr. Sam Impey, co-founder of ExoAnalytics, explains that the optimal range for fueling is between 80-90% efficiency. For the author, this means there's potential to process slightly higher amounts of carbs, possibly reaching the mid-70g range. This discovery opens up exciting possibilities for performance gains, but it also raises questions about the limits of carbohydrate oxidation.

The article concludes with a thought-provoking question: Can you train your gut to oxidize even greater volumes of carbs? While the 'how' remains a mystery, the potential for unlocking new personal bests is tantalizing. So, are you ready to push the boundaries of your cycling performance? Share your thoughts in the comments below and let's discuss the future of sports nutrition!

How Many Carbs Can You Use Per Hour When Cycling? At-Home Test Revealed! (2026)

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