How This Fueling Strategy Is Changing Endurance Sports

Summary by Krater

An endurance coach reviews the science behind high-carb fueling in endurance sports, explaining how consuming 100 to 120 grams of carbohydrates per hour improves performance, reduces muscle damage, and lowers internal load. The video concludes with practical tips on how to implement high-carb fueling and gut training safely.

From the video

Answers: How many carbohydrates should endurance athletes consume during a race?

• High-carb fueling strategies in endurance sports
• Science of carbohydrate absorption and oxidation
• Gut training for high carbohydrate intake
• Common fueling mistakes made by endurance athletes

What it concludes

• Ingesting a mix of glucose and fructose allows athletes to push past the old 60-gram limit and take in 120 grams of carbohydrates per hour.
• Cyclists fueled with a mix of glucose and fructose improved their time-trial performance compared to glucose alone.
• Athletes consuming 120 grams of carbohydrates per hour during a mountain marathon showed less muscle damage, lower internal training load, and better next-day performance.
• Repetitive exposure to nutrition before and during exercise trains the gastrointestinal tract, improves feeding tolerance, and reduces exercise-associated gastrointestinal symptoms.
• Periodized carbohydrate restriction does not enhance performance in endurance-trained athletes and often leads to reduced training quality.
• Low general race-day energy intake leads to poorer performance and a nearly 3x higher likelihood of needing medical support.