Lactate acid is building up when you feel the burn. It's okay to ride through it. The more efficient your respiratory system is, the quicker you can rid of it. I can usually get rid of mine with a minute or two of easy pedaling. Thom gets his at about mile 60 in any ride - no matter how easy or hard the ride - and he can't get rid of it. I think a lot of that is genetic.

V.