1- Grass
2- Dirt
3- Rubberized Track
4- Blacktop
5- Treadmill
6- Concrete
7- Wood Plank
8- Cobblestone
9- Marble
10- Metal
11- Traffic Spikes
Wednesday, May 27, 2009
Running Surfaces In Order of Body Damage Caused Best to Worst
Labels:
Health and Wellness,
Jackass Fitness,
Traffic spikes
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