The human Movement System is incredibly complex. It ultimately produces movement (go figure!), which is the result of a dynamic interaction of the nervous, muscular, skeletal, endocrine, pulmonary, and cardiovascular systems of the human body. Physical Therapists have many responsibilities and skills, but at the end of the day, we treat and enhance the Movement System. This system, while intricate, can be simplified in such a way that allows us to determine variables that are