this is Roller Derby!
For real, what is roller derby?
Roller derby is a game where one skater (known as a Jammer) laps as many of the opposing team's skaters as they can to score points.
The other skaters act as defense and offense, stopping the other team from scoring points, and helping their team mate score as many points as they can.
THE GAME:
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A game or bout, is divided into two 30 minute halves. Each half is broken into jams. A jam is a maximum of 2 minutes!
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To start the jam, jammers are positioned behind the blockers. The whistle blows, and the jammers attempt to push through the pack.
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After breaking through the pack, the jammer scores one point for every member of the opposing team they pass.
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The blockers work together to stop the opposing team's jammer. Any time contact is made between players, it is called a block. Blocks must be delivered to legal target zones using only legal blocking moves.
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The lead jammer may call off the jam by moving their hands to and from their hips.

THE PLAYERS:
Each team has 5 players on the track at a time. These 5 players consist of:
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1 Jammer (designated by a star on their helmet cover): they score one point for every time they lap a member of the opposing team
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3 Blockers: they are players who attempt to stop the opposing jammer from gaining points
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1 Pivot (designated by a stripe on their helmet cover): they are a blocker that has the ability to become the jammer when passed the jammer’s helmet cover
Together, the blockers and pivots from both teams form the pack.



PENALTIES:
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A penalty is 30 seconds, and begins when the player has taken their seat in the penalty box. The penalty clock stops between jams.
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Jammers may serve less than 30 seconds if the opposing jammer takes a seat in the penalty box. In this case, the opposing jammer is only required to serve the same amount of time for their penalty.
