Cushioned running shoes are holding runners from being protected from injury by causing a runner to land with more impact and other kinds of mechanical outputs that aren’t good for injury prevention. Below are decades of research proving cushioned running shoes are a continuing mechanical interference that not only cause long-lasting damaging to the knee, but are equally damaging to your feet and your overall running form.

Are Nike Frees Barefoot Shoes?
The Nike Free is not a barefoot shoe because the heel is too thickly cushioned and stiff which was found to impair forefoot strike adaption as compared with barefoot running.