Running is a physically demanding sport. When you stand on one leg, 100% of your body weight applies to that limb. However, the act of running (think leaping through the air!) adds to the force through a single leg, up to 2 or 3 times. Garmin reports that my average stride length is ~1.15m, so over the course of 10km that adds up to over 8,600 steps. Every step when running forces your body to absorb and release energy. Running regularly is important to improve, but the number of steps quickly add up, and poor run form will cause the body needing to soak up much of the energy created.…