Originally Posted by StanSeven

There are exceptions to running marathons frequently. Here's a local DC guy who does well

http://en.wikipedia.org/wiki/Michael_Wardian

Michael Wardian (born April 12, 1974) is an American marathoner and ultra-marathoner. He won the 2008, 2009 and 2010 US 50 km championships.[1] In 2008, he won the U.S. National 100 km championship.[2] Wardian also is the 2007 JFK 50 Mile winner, and won the National Marathon (now known as the Rock 'n' Roll USA Marathon) in Washington D.C. three consecutive years (2006–2008), and in 2010, 2011 and 2012.[3][4][5][6][7]

Wardian is known for the vast number of marathons he participates in. During a 45 day span in 2006, Wardian won four out of five marathons he raced.[8] In 2007, he ran 13 marathons (not including ultra-marathons), and seven marathons in a span of nine weeks (winning three).[9] March 2008 saw Wardian win the National Marathon in Washington D.C. on a Saturday, and then finish third at a marathon in Knoxville, Tennessee the very next day.[10] In 2008, Wardian ran a total of 53 races.[11] Wardian frequently participates in local races in the Washington D.C. area.[12]