Quite an interesting article although I skimmed some of it as it's pretty long.
The National Ski Areas Association reports that TBIs are the leading cause of skiing and snowboarding fatalities. And the numbers are growing. In 2004, 9,308 skiers and snowboarders suffered head injuries they deemed serious enough to visit a doctor. By 2010, that number had jumped to 14,947.
What the numbers don’t reveal is that the rise in brain injuries has happened during a period when helmet use among skiers and snowboarders has increased by 20 percent.
So does that mean that wearing helmets increases the risk of brain injury?