The way you move and align yourself will influence whether or not you will have musculoskeletal pain as you grow older and how severe. It is also important in how good of an athlete you will be; you cannot put yourself in weird alignments and expect optimal performance. Kids benefit greatly from karate classes for kids, as they learn posture, movement, and alignment that support long-term health and athletic ability. Dr. Shirley Sahrmann (Washington University Physical Therapy).