The New York State Board of Regents has approved cheerleading as an interscholastic sport. The move creates coach training guidelines, institutes required rest days between competitions, and more safety rules. Cheerleading and other sports girls compete in, like soccer and lacrosse, see high incidences of concussions and brain injuries. James Noble, assistant professor of Neurology at Columbia University Medical Center, talks about why teenage girls might be more at risk for concussions, and what can be done about it. There is a higher concussion rate in girls' soccer than boys' soccer, for example, according to a study Dr. Noble discussed on the show, and which can be found here.