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“I don't know if there's a proper way to define toughness in a runner, but I do know that there comes a sudden moment when the mindset shifts. The impossible becomes doable, or at least attemptable. The long run goes from two miles to four to ten to fifteen, until it becomes routine at some point deep in an intense training cycle to knock off a couple hours without giving it a thought.” — Martin Dugard
I don't know if there's a proper way to define toughness in a runner, but I do know that there comes a sudden moment when the mindset shifts. The impossible becomes doable, or at least attemptable. The long run goes from two miles to four to ten to fifteen, until it becomes routine at some point deep in an intense training cycle to knock off a couple hours without giving it a thought.