Ok what gives. I've put in 1000 miles of training, and my stamina is in the toilet the past few weeks. I'm seriously bonking around 5-8 miles into my rides. To the point I have to stop, rest, and eat some Gu. I can easily do 50 miles on a ride, but it's these first 10 that are just KILLING me.

It's really a problem when I do my club rides, because I can't just stop and rest without holding everyone up. Today I had to stop about 20 miles into it because I couldn't recover from that initial bonk. I ate carbs for lunch but it didn't seem to matter. I also got that lovely ammonia smell again

So what's the deal? I do have crohn's disease, and I swear if it's that causing me issues I'm going to scream. I'm going to talk to my doc about this too.

I was wondering if any of you use those amino fuel mixes and similar things that they advertise in Bicycling mag and sell at GNC. Do they work?

I'm doing RAGBRAI in about a month and am a little concerned right now.

Thanks for any tips on what this might be and how to offset it.