Heel strike running accounts for nearly most running injuries because the farther back you land on your heel, the greater the over-reach of the leg, the greater the stride length, and therefore, the lower the cadence. What makes this so injurious is it pushes the center mass (upper body) to tilt too far back from initial foot strike position. This causes the mass of the body to abruptly grind to a halt for a prolong period of time, resulting in higher levels of damaging impacts and mechanical loads which are well on record for harming the foot and leg as compared with forefoot running. Read more here!