ICF Canoe Marathon World Championships

Since Mads’ marathon canoe races last around two hours, he sits right on the threshold of carbohydrate recommendations, moving up from 60g/h toward 90g/h for exercise lasting more than two hours. Given both the duration and the extremely high intensity he sustains, Mads has gradually increased the amount of carbs he can comfortably consume in races. His intake has progressed from ~50g/h early in 2022, to ~58g/h at the European Champs in July 2022, then ~78g/h at the European Champs in 2023, ~81g/h at the World Champs in 2024 and now to over 90g/h. This impressive level of carbohydrate not only fueled his title-retaining performance, but also supports his training by maximising performance adaptations. Arguably, the bigger challenge in canoe marathon racing is the logistics of getting this amount of fuel on board. As discussed in Mads’ previous case studies, he relies on liquid carbs from drink bags around his neck. This time he increased the concentration of these drink bags to boost carbohydrate intake without a proportional rise in fluid volume to hit his highest carb intake yet.

Mads drank a similar quantity of fluid in this race as in his previous ‘hot’ and ‘very hot’ marathon races. He uses his drink bags to predominantly get fuel into his system, but knows that two to three of these ~600ml bags helps to replace a high proportion of his sweat losses across the two hour races. In each bag, Mads uses one PH 1000 (Tablet) to replace his sodium losses at a moderate concentration, as well as aid retention of the fluid he is drinking.