[anonymousDan]

These claims about how we're running in the wrong way because we should be running barefoot all seem to rest on the premise that that is how we evolved. The problem I have with that is they neglect to mention there weren't any concrete roads or sidewalks around when our running abilities evolved either, so who's to say our anatomy was ever designed to work on such hard surfaces? Sure if you can manage to run barefoot on only natural surfaces it might make sense, but this is never mentioned by anyone.

[undersuit]

Our anatomy evolved to work on almost all surfaces. The early homo erectus that could not run on a surface was genetically less fit. Our gait changes slightly depending on what surfaces we run on; loose rock, sand, packed dirt, or concrete. Not being able to run on concrete would mean our ancestors would have avoided rocky areas... which they did not.

[anonymousDan]

Not convinced. I highly doubt there is any evidence of our ancestors running barefoot for long distances over rocky areas. From what I know the primary reason our running abilities evolved was to allow chasing grazing animals over long distances on grasslands. Be interested to see any evidence otherwise though!