Dr. Amanda explains why our bodies naturally change to a poor posture position as we go through the day when we are sitting. She then talks about how important good posture is for our bodies by using three examples. First, the negative effects slouching has on our backs and shoulders. Next, how slouching and looking up at our work can cause a buildup of pressure in our necks and dizziness. Third, how slouching puts a great deal of pressure on the muscles and joints in your jaw.