Endure

"The science of how we pace ourselves turns out to be surprisingly complex (as we'll see in later chapters). You judge what's sustainable based not only on how you feel, but on how that feeling compares to how you expected to feel at that point in the race." (p. 11)

"In 2012, Sports Illustrated writer David Epstein recounted  the ordeal of Rhiannon Hull, a talented distance runner who had competed for the University of Oregon's fabled track and cross-country programs. Six weeks after moving to Costa Rica in 2011, she and her six-year-old son, Julian, headed to a local beach on an overcast day when no one else was around, and got pulled away from shore by a riptide. By the time two teenage surfers spotted them and managed to paddle to the rescue, Hull, a wiry 5'2" marathoner who at age thirty-three still ran twice a day, had been holding her son aloft in the water for nearly half an hour - he was "standing on Mommy," he later recalled." (p. 118)

From Endure by Alex Hutchinson