This is a common misconception about barefoot running. It doesn’t force the runner, but rather restores the correct functioning of the locomotive system. By allowing the foot to feel the ground, involuntary reflexes trigger “impact moderating behavior.
TriCounty Times Living barefoot running
http://www.tctimes.com/articles/2010/11/10/living/doc4cd16f318f0c9647144733.txt
The point of running barefoot is to force the runner to run and land their feet properly.
(via Instapaper)