Have you heard of “Good Form Running”?  This running form was developed by Curt Munson and John Benedict.  They are the co-owners of Playmakers, a specialty running store in Okemos, Michigan.  They believe that running is a skill to be learned.  They have defined several points do practice in an effort to run faster, easier and injury free.  The first topic is posture.  Good posture includes your feet, legs, torso, head and arms.  Your feet should be facing straight ahead, and your knees soft, not locked.  Your head should be level with your eyes looking forward.  You can reset your body posture by reaching to the sky with your hands and then returning them to your side.  Your arms should be relaxed and  at a 90 degree angle bend at the elbow while you are running.  Do not swing your arms across your body.  If you swing your arms across your body you will be wasting energy in a side to side movement that doesn’t help your speed.  Practice good posture while you run and run relaxed to improve your time and energy usage.