Mark Neilan never ran cross country in high school. And he wasn't very into sports. But now he runs 100-mile races regularly. Find out how he made the transition to becoming an endurance athlete, how he trains, and the mentality he uses to survive such grueling tests of willpower. Mark is the owner of Excel Fitness Center.

IG: @excelfitnesscenter @mark_neilan

Find me here:

Website - https://www.rolliepeterkin.com/podcast

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My book - The Cage: Escaping the American Dream http://amzn.to/1Y0xbzD