Currently, more than 17 million people in the U.S. participate in In-Line Skating, (also called rollerblading) In-line skates have been around for centuries, but only became commercially available in 1987. In-Line Skating surged in the 1980's, but dropped off after 2001 and, recently, has seen resurgence in participation.

Most of the country is experiencing the first blast of prolonged frigid temperatures. When extreme cold arrives, so do questions about cancelling outdoor recess, lunch or physical education.The primary safety concern during extreme cold weather is the risk of frostbite. Frostbite is the freezing of skin and damage to underlying blood vessels due to exposure to the extreme cold. Frostbite occurs when the skin temperature reaches and stays at or below 23 °F degrees. Although students are rarely outdoors for an extended period of time, frostbite can occur to exposed skin within 20 - 30 minutes with modest wind and temperatures in the teens.