This is from Samuel Abt’s book _LeMond_ (1990):
> “The key is being able to endure psychologically,” LeMond explained. “When you’re not riding well, you think. Why suffer? Why push yourself for four or five hours? The mountains are the pinnacle of suffering. You don’t know when you’re going to explode, when you have to back off. You’re pushing yourself almost to your maximum; then you recuperate and do it again. You might do it ten or fifteen times in a race. When you don’t have the conditioning or if you’ve been away from it a long time, you forget how much cycling hurts. You really forget.”
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> Samuel Abt (1990). _LeMond: The Incredible Comeback of an American Hero_ , p. 4. New York: Random House.
Abt was a sports journalist who covered professional cycling, so the quote probably comes from an interview LeMond gave to Abt or a colleague.