The problem I tend to have with rides 50 miles or over is, I always throw up right around the 48-50 mile mark. At first I thought the problem had to do with inadequate food intake during the ride, but all that happened when I increased the food intake was bringing even more up. I truly believe I could finish at least metric century ride if I could figure out what's causing my tummy to revolt. I also don't think I'm eating the wrong things, because I eat what's typical on long rides: energy bars, Nutri-Grains, fruit, breads, etc. (A word about Power Bars by the way: I don't know if anyone else has this problem, but they make me fart. It's really embarrassing, especially while in a peloton! But I suppose that should be addressed in a separate thread.) Anyway, I'm getting a little worried about the barfing problem, because while it's good to take in adequate fuel during long rides, what the hell good does it do you if you lose it all, hmm??? I have a metric century coming up in a couple weeks, and I'm determined to get to that elusive 68-mile mark, whether I'm puking or not, but I would prefer not, obviously!