An Introduction to running surfaces

http://daltonrbiz041.jigsy.com/entries/general/10-tips-for-making-a-good-running-surfaces-even-better

Asphalt - Now you would believe that asphalt is simply as bad as concrete, however it is not. It's in fact about 8 times "softer". The genuine problem with working on asphalt roads is not the hardness, but the