Skiing and snowboarding are very fun sports but they're also dangerous. If you look at statistics across the country of how many injuries occur,it's about 3 injuries per 1000 skiers or boarders each day on the mountain. And those injuries run the spectrum from minor sprains to paralysis or even death. So what we need to do tonight is tryto understand what these injuries are, really delve into the causes of them and then outline what prevention tips that are specific that may be helpful.

Allan Mishra, M.D., is an orthopedic surgeon at the Stanford University Medical Center and one of the leading researchers in the field.