There main message from these studies is:
– When it comes to injury prevention and running efficiency, it’s much more important how you run than what you run in. Heel strikers, regardless of shoe, will sustain more impact injuries than those who land on their mid or forefoot and allow their arches to act as natural shock-absorbers. The most efficient and least-injury-prone runners shorten their stride, land on the forefoot, and keep the running motion smooth, light and flowing.
Read more here: Going Shoeless The Pros & Cons of Barefoot Running