Mountain biking comes in tied for 5th in the National Estimates of Outdoor Recreational Injuries Treated in Emergency Departments for non-fatal injuries. The top four are: 25.5% – Snowboarding 10.8% – Sledding 6.3% – Hiking – who would of thought? 3.7% – Personal Watercraft (not boats) Mountain biking is tied with Water skiing at 3.6%.…