Flat track roller derby is a fast-paced contact team sport that requires speed, strategy, and athleticism. The flat track version of the sport evolved in 2001, and has quickly grown to encompass more than 400 leagues worldwide. This is in large part due to the ease of setting up a flat track–it can be done on any flat surface that is suitable for skating, such as skating rinks, basketball courts, parking lots, and even airplane hangars. This greatly reduces the capital needed to start up a roller derby league, and allows small groups of people to get a fledgling league off the ground. The DIY spirit that drives the sport allows roller derby leagues to create their own unique identities and adapt their structures to reflect their local communities. (Right from WFTDA Website.)

 

Check out this short Video from WFTDA.com to help you understand the game.