The science advises topping up with 30 g of carbohydrates per hour for training between 1.5 and 2.5 hours. (womenshealthandfitness.com.au)
For training runs longer then 60 to 90 minutes, aim to take in 30 - 80 grams of carbohydrate per hour. (luvoinc.com)
Dr. Andrew Hill: But that's when I have profound physiologic signal of you know, glycogen depletion and good note for, you know, levels of carb intake, the human body is fully depleted can store about 50g of carbohydrates per hour. (justinhealth.com)