Each time a runner's foot hits the ground, an impact force averaging three times their weight travels through the body at more than 200 miles per hour, causing the bones to vibrate and tendons to stretch. An average runner strikes the ground more than 10,000 times per hour, resulting in a remarkable amount of force to the body. But the truth is those impact forces need not be as harmful as they sound. In Injury-Free Running, Thomas C. Michaud explains how an understanding of anatomy and biomechanics, coupled with the latest strengthening exercises and rehab protocols, can keep runners injury free. By modifying our running form and engaging specific exercises to improve tendon resiliency, we can learn to store and return energy more efficiently while also running faster and with less effort.