by Duncan Larkin, Published Nov. 1, 2010, Updated Sep. 12, 2012 at 12:56 PM UTC
The three-time NYC Marathon champion has been working on Dathan Ritzenhein's stride. Will his tinkering pay off for Ritz on Sunday?
by Sean McKeon, Published Feb. 11, 2009, Updated Jun. 9, 2009 at 1:43 PM UTC
Here are five quick tips to improve your speed.
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