skaters are racing one skater is allowed to drop off and stop racing. The clock stops when the third skater crosses the finish line. Team pursuit The team pursuit is a team event in speed skating and is skated by teams of three skaters. Races resemble the team pursuit event in track cycling. Two teams race at a time, starting at a line in the middle of the straightaway. One team starts on each side of the track. Only the inner lane is used. The distance is eight laps for men and six for women. The team's time is the third skater to cross the finish line. There are several formats for the team pursuit. The Olympic format is unusual in that it is a cup format, with several rounds of exclusion between two teams. In the World Cup and World Championships, one race is skated and the teams are ranked by their finishing time. In the Olympic format, a team that overtakes the other has automatically won the race and the remaining distance is not skated. In practice, the distance is so short that this rarely happens unless one team has a fall. The team pursuit is a new event in major international competitions. The event was introduced at international level at the world junior championships around the turn of the millennium, and to the World Cup in 2003, but it was not considered an official ISU event until around 2004, and eventually introduced at the Olympics in 2006. Equipment Speed skates Speed skates differ greatly from hockey skates and figure skates. Unlike hockey skates and figure skates, speed skates cut off at the ankle and are built more like a shoe than a boot to allow for more ankle compression. The blades range in length from 30 to 45 cm depending on the age and height of the skater. Short track blades are fixed to the boot in at the heel and immediately behind the ball of the foot. Long track skates, also called clap skates, attach to a hinge at the front of the boot. The heel of the boot detaches from the blade on every stroke, through a spring mechanism located at the front connector. This extends the skater's stroke by keeping the blade on the ice longer. Speed skates are manually sharpened using a jig to hold them in place. Short track All short track