What would it take to permanently shift your sense of the impossible?

For runner, author, and coach Matt Fitzgerald, it was an all-in approach to training for this year’s Chicago Marathon. He moved to Flagstaff, Arizona; trained with pro runners and an elite-level coach; and as a result, ran his personal-best time of 2:39:30 at age 46, something he’d previously thought inconceivable.

On todays’ episode of #WeGotGoals, Matt talks about the nuts and bolts of the differences between training as an amateur and an elite—and how the experience has changed him in ways that go far beyond miles and finishing times.

“If I have a vision for something and my first thought is, ‘that’s impossible,’ I’ll catch myself and say—‘You thought that once before about something else, and it wasn’t,’” he says.