This information is right on. It makes so much sense. I grew up on a farm and as a kid went barefoot all the time. It was no problem running on the gravel roads. Heel striking is such a poor strategy for running and I know of no one who would consciously heel strike when they run barefoot. That should be a clue. Little kids running and jumping while barefoot never land on their heels. Only adults would do such a silly thing. Thanks for this information and website. Respectful ly, Duane Spears