We try to gain a competitive edge from things like nutrition, recovery, weight training, and new shoes. But what if becoming a parent does the trick? Ultrarunner Tyler Green was entering the biggest year of his running life when he became a father. Suddenly, instead of carefree miles through the parks and trails near his house, he was timing his runs around nap time and hiking with a baby on his back. Can a running career withstand a year of compromised training? Can a baby make you faster?

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