Roller Derby is a contact sport played on roller skates, typically on an oval track. Teams consist of five players each, with one designated as the jammer who scores points by lapping opposing players. The game is fast-paced and combines elements of strategy, speed, and physicality. Matches are divided into periods called jams, lasting up to two minutes. Players can block opponents and assist their own jammer to navigate through the pack. Roller Derby has gained popularity as a grassroots sport, with leagues forming worldwide, promoting inclusivity and community engagement.