so recently, i've been reading various nutritional articles relating to cycling, and also a number of first hand accounts from cyclists regarding their own nutrition plans. i have noticed that a number of them have mentioned entirely cutting out caffeine. i, personally, don't ingest coffee before riding because it bothers my stomach, but i drink a fair amount the rest of the day. so, my question is, why no caffeine in the diets of so many riders? is it just a digestive thing or is there some other detrimental nutritional factor?