Originally Posted by
Iride01
I'd tend to think if you eat more because of that longer ride, then you probably are having to put out too much effort currently to do those longer rides.
I can't see that how hungry you are is a good measure of the training effect of a ride.
All other things equal: the longer the effort, the higher the training stress, the greater the fitness adaptation.
A measure of "too much effort" would be symptoms of overtraining: fatigue, lethargy, insomnia, weight fluctuations, high resting heart rate, etc.