In triathlon, nutrition has a significant impact on race-day performance. And, according to Professor Asker Jeukendrup, your gut can be trained as acutely as your muscles, heart and lungs by such simple methods as training straight after a meal and with relatively large volumes of fluid. But, importantly for your race, you can also train your body to absorb more carbs. Jeukendrup has already taught us that by mixing glucose and fructose, you can ingest up to 90g of carbs per hour without gastric issues. But for many, that’s still not possible. Jeukendrup’s recent paper, however, explains how athletes have increased carb absorption after slowly increasing intake over 28 days. “From a practical viewpoint, increasing in-training carb intake for one session a week for between five and 10 weeks is…