Hello! I'm pretty new around here, and didn't start cycling again until the last year, so I have lots of questions, but I'll keep this thread to just one. I tend to rise pretty hard, mostly because it feels good. I have no specific training regimen, although I'm think about one for the near future. Anyway, I've noticed that at about mile 18 of a 35 mile ride, I no longer feel any discomfort or pain in my legs from lactic acid. They just feel totally fresh, and pushing harder doesn't cause me to feel the burn at all. That doesn't mean that I can accelerate very much, but I don't have the burn to accompany the effort. Is this normal? It always freaks me out a little, since the burn gets worse and worse and then - gone. It doesn't happen on every ride; maybe 60% of them Why does this happen? It doesn't seem to be related to eating, because on many rides I go out without a powerbar; just Gatoraid or something similar. Any ideas?