Originally Posted by PeteHski

That’s very interesting. But completely at odds with the advice I listen to on the Trainer Road podcast, where their pro athletes eat like horses pretty much from the start of any ride longer than an hour and actually train their guts to deal with more and more fuel on the bike. Some of them are taking in 120g or more of carbs per hour (but I can only manage about 80g) and it doesn’t appear to be proportional to body weight. I’ve had good results following this basic strategy. You can get those carbs in a variety of different ways, but I usually start with solids and then move more toward liquids and gels during a long fast ride. I usually start struggling with bars after eating 2 or 3 over a couple of hours, but I can keep on consuming liquid and gels throughout a long ride.