The Edmonton Journal in Canada reports today that snowboard wrist fractures, as well as snowboard arm and elbow fractures are on the rise, due to inexperienced snowboarders falling the wrong way. The article has hints for falling "successfully" to help avoid the hyperflexion of the wrist that can cause a fracture. http://www.canada.com/edmontonjournal/news/cityplus/story.html?id=a95f2135-9965-4290-b603-6cfae79fc78c&k=5536
To help avoid snowboard wrist injury there is also a snowboard wrist guard designed by a doctor to help reduce injury. It has shown to reduce snowboard wrist injury by 67%. Check out http://www.Flexmeters.com.