Running Shoeless

Do we really need a good pair of running shoes to run well?  In this video, a Harvard professor points out that humans have been running for a long, long time…without their Nikes on.  I like the fact that he is questioning the status quo and enjoys running without any expensive footwear.  But what about asphalt and concrete?  Perhaps it’s best to stay on sand, grass, and other soft surfaces when running shoeless…but I would love to get some feedback from people out there who do run barefoot.