How To // Skateboarding Research

'Skateboarding was, at first, tied to the culture of surfing. As skateboarding spread across the United States to places unfamiliar with surfing or surfing culture, it developed an image of its own. For example, the classic film short Video Days (1991) portrayed skateboarders as reckless rebels

 Safety

Skateboards, along with other small-wheeled transportation such as in-line skates and scooters, suffer a safety problem: riders may easily be thrown from small cracks and outcroppings in pavement, especially where the cracks run across the direction of travel. Hitting such an irregularity is the major cause of falls and injuries. The risk may be reduced at higher travel speeds.

Severe injuries are relatively rare. Commonly, a skateboarder who falls suffers from scrapes, cuts, bruises, and sprains. Among injuries reported to a hospital, about half involve broken bones, usually the long bones in the leg or arm^. One-third of skateboarders with reported injuries are very new to the sport, having started skating within one week of the injury. Although less common, involving 3.5% to 9% of reported injuries, traumatic head injuries and death are possible severe outcomes.

Skating as a form of transportation exposes the skateboarder to the dangers of other traffic. Skateboarders on the street may be hit by other vehicles or may fall into vehicular traffic.

Skateboarders also pose a risk to other pedestrians and traffic. If the skateboarder falls, the skateboard may roll or fly into another person. A skateboarder who collides with a person who is walking or biking may injure or, rarely, kill that person.

Many jurisdictions require skateboarders to wear bicycle helmets to reduce the risk of head injuries and death. Other protective gear, such as wrist guards, also reduce injury. Some medical researchers have proposed restricting skateboarding to designated, specially designed areas, to reduce the number and severity of injuries, and to eliminate injuries caused by motor vehicles or to other pedestrians.

The use, ownership and sale of skateboards were forbidden in Norway from 1978 to 1989 because of the high number of injuries caused by boards. The ban led skateboarders to construct ramps in the forest and other secluded areas to avoid the police..' -  Wikipedia:
http://en.wikipedia.org/wiki/Skateboarding