Perhaps the most confusing track cycling event to follow, the madison is similar to the points race but with teams of two riders racing 50km (200 laps).
Intermediate sprints are held every 10 laps, with five points for the winner followed by three, two and one for the next three over the line - while these points are doubled for the final sprint at the end of the race. Teams can also earn 20 points by gaining a lap on the main bunch.
One rider is always active, while the other continues to ride round, but is effectively 'resting' at the top of the track. When the active rider needs a breather, around every lap and a half or so, they 'hand-sling' their partner into the action. The best madison duos have an endurance rider capable of gaining a lap and a sprinter to win points.
With all teams racing at the same time, trying to gain a lap on their rivals or win sprints, it is quite an impressive spectacle. The team with the most points at the end of the race is the winner and if there is a draw on points, places in the final sprint determine the winner.