Showing posts with label Jackass Fitness. Show all posts
Showing posts with label Jackass Fitness. Show all posts

Wednesday, May 27, 2009

Running Surfaces In Order of Body Damage Caused Best to Worst

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