http://www.sierradescents.com/books/2009/05/29/born-to-run.html Climb Up and Ski Down Fri, 10 Feb 2012 01:50:36 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://www.sierradescents.com/books/2009/05/29/born-to-run.html/comment-page-1#comment-521 Scott Tue, 23 Jun 2009 22:57:29 +0000 http://www.sierradescents.com/?p=918#comment-521 My question is, how much of this is because they only ran on trails and not asphalt/concrete? And how many of our runners suffer because of paved surfaces? Unpaved surfaces are much, much easier on a runner's body than pavement, but most runners still spend their time on roads. My question is, how much of this is because they only ran on trails and not asphalt/concrete? And how many of our runners suffer because of paved surfaces? Unpaved surfaces are much, much easier on a runner’s body than pavement, but most runners still spend their time on roads.

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