There is a lot of wisdom in Father-Son duo Brent and Jeff Coffin’s joint preparations for the New York City Marathon — they have stayed up late nights talking strategy and exchanges sleepovers to work out their different strengths. No kidding.

And they have a lot of passion for running. Brent, a 42-year-old former race director of the Rock ‘n’ Roll Marathon Series, went from a casual jogger to running six marathons per year by age 30. About five years ago, he let his cholesterol fall and underwent a difficult two-year preparation for Ironman competitions.

(Co-wrote this post with Jeff Coffin, a 38-year-old triathlete and father of four who grew up in New York’s Finger Lakes.)

Jeff and Brent share a family room at Shell Beach Resort in Thomaston, N.Y., where they train together. (An outer office might be where Brent mans the grill.) Brent fields the Thanksgiving Day question, even though it’s probably too late for his six-year-old twins to answer. This is the day they’re asking when he’ll be good to race. (“I’m blessed,” he says.) Jeff is proud of his son’s accomplishments, saying, “I’m not surprised at all, just because he puts in a ton of time and effort. I’m pushing against myself.”

Jeff is reticent, nonetheless, about offering up his secrets to success.

This much he did say: “I love long runs.”

Read the full story here.

Photo illustration by Kenzo Tribouillard.