This phenomenon of running every day is known as streaking. The United States Running Streak Association(USRA) defines a running streak as running at least one continuous mile within each calendar day under one's own body power (without the utilization of any type of health or mechanical aid other than prosthetic devices). There's actually a website (RunEveryDay.com) that lists the active U.S. running streakers. That's where my friend Mike discovered Matt and his 18-year streak.
I'm an avid runner, but I can't imagine running every day. That definitely takes some determination and commitment. I think having three kids ended any inkling I may have ever had about starting a running streak, but I marvel at those who can achieve such a life-long goal of running every day. One such marvel is Robert Kraft. Kraft lives in South Miami and has run 8 miles every day since March 21, 1975! This past March he completed his 100,000th mile. To learn more about this determined man they call "The Raven" check out the video clip below from ESPN.