If you run in shoes, especially in shoes with more padding under the heel than the front of the shoe, causes the front of your foot to lift up at landing to enable heel strike, but this also pushes the ankle too land far in front of the knee. This landing configuration was found to place enormous mechanic work and stress on the knee-joint.
In contrast, Barefoot running safeguards your knees by enhancing your mechanics at every level, such as improving ankle position at landing, enabling the ankle to land under the knee vs when you run in cushioned shoes which unintentionally tends to push your ankle in front of the knee at landing, resulting in an over-stride which is a huge source of high impact. Read more here!
