Although walking is the base of running, it differs in the length of stride, the absence of ground contact, the increase ground contact force and the cadence of the stride.... 

Whether you are a heel striker, mid-foot striker or a forefoot striker you will go forward: but at what cost!!  The muscle dynamics and firing sequence for all of these running styles are quite different.  Moreover, mid-foot strikers have shown to increase oxygen consumption up to 50%...

Injured runners are welcome to have their running gait assessed on treadmill and firm ground to have a biomechanical breakdown of their running technique.

  Youth Olympic Games, Singapore 2010