Making the Case for Running Shoes (vs barefoot) via @paleoperiodical
March 21, 2012 §
When barefoot runners and shod runners carried the same weight on their feet, barefoot running used almost 4 percent more energy during every step than running in shoes.
via Making the Case for Running Shoes – NYTimes.com.
My take is that the health crowd could not (should not?) care less about metabolic efficiency – if anything, less efficient is better. The more interesting qn is which of the options puts more strain on the body