Rules to play Roller Skating
A basic wall consists of two blockers working together to take up as much space on the track as possible to make it difficult for the opposing team to maneuver. Walling up refers to creating a wall formation at a strategic time, so the opposing team (especially the jammer) has no time to respond. A wall can inhibit, slow down, and ultimately trap the opposing jammer, and may last an entire jam if they can effectively hold the opposing team. Variations on the strategy include setting up blockers to rotate through the wall positions.