Altered running postures are ultimately going to lead to sprains, strains, fractures and eventually degeneration, typically in the hips or low back, which causes many runners to give up running for the rest of their lives.
If every single joint in your spine and hips isn’t moving correctly eventually the joints are going to degenerate. This is because the impact between your foot and the ground needs to be evenly dispersed throughout your body joint by joint, if any of these joints is fixated or stuck the impact is going to go to this same joint over and over causing it to degenerate.
Click here to view a video from New Jersey Sports Medicine and Performance CenterNew Jersey Sports Med Gait Video. After watching this video pay close attention to your form the next time you are out for a run.