I am busy training for IM Austria in July, and have recently completed a few 3 hour plus ride sessions on Saturday. During these rides I thought I would test my carb intake abilities. I jumped straight in to 90g\hour and have not seen any ill effect. However, I am now not sure if the tests are valid or not. Riding intensity was TR Endurance zone for each of these tests. During SS I easily took in 60g\hour, but these workouts were only for a maximum of 2 hours.
Is there a suggested protocol for testing carb tolerance during workouts? Im struggling to find any additional info on how to best test. Everyone says to test, but dont go into how the test should be performed.
Thanks for any advice.