When running records are set in areas with controlled conditions (e.g. nothing on the ground that could cause problems if barefoot), the runners still wear shoes.
It seems a curious idea that you run faster with shoes on than without, given the increase in weight on your feet.
– The theoretical part of the question: Is there any evidence that running in lightweight shoes is faster than running barefoot?
– The practical part of the question: Why are (seemingly) no running records set with people running barefoot?
Please provide links to evidence.