““He explained how pushing above his threshold for short bursts of time at the beginning of each hill allowed him to breathe more easily on the long climbs. I nodded enthusiastically and understood little of what he was telling me. "How about you?" he asked. "How do you structure your training?" "I go until I'm tired," I said. "And then I do it again the next day." "That's probably not very effective," John said.””