http://www.zenlabsfitness.com/difference-running-treadmill-running-pavement/
As you gear up to get started on your running routine, one of the most important things that you might be asking yourself is where to do your runs. While some people have a srong preference of either the treadmill or outside, others may not be so sure.
Is one better than the other? Would you see enhanced results running outdoors compared to on a treadmill? Or perhaps the treadmill is better?
By understanding the differences between the two, you can make a more informed decision on where to do your runs.