Concussion injuries are worse for women. Mountain biking is a high concussion sport. A helmet does not prevent concussion. Parks Victoria is encouraging mountain biking under its Healthy Parks, Healthy People program. The problem with advocating mountain biking as healthy is that weighing the health benefits of the exercise against injuries with their short and long term consequences is never taken into account. Our medical researchers and our insurance companies are trying to get the government to take this seriously. Sports are becoming more aware of it and making minor adjustments.