World renowned endurance athlete, bestselling author and ultramarathon runner Dean Karnazes recently tried the Zero Runner at the New York City Marathon race expo. Like many runners, Dean was initially skeptical of the Zero Runner’s ability to provide a natural running workout with zero-impact. See what Dean had to say…

Learn more about the Zero Runner and see it in action at www.zerorunner.com.

Article from Dean Karnaze’s blog on Runners World website.  See the original blog post.