"The state of flow that some people associate with "natural running form" is simply what happens when you run in the right posture. When you run in the right posture there's less need to dwell on any one fine point of perfect running form. You already have it. You were born with it. The most important thing is to “own” your physical body. If you slump, you will lose yourself. Your mind will be wandering about somewhere else; you will not be in your body."