The sprint or match sprint is a track cycling event involving between two and four riders, though it is usually run as a one-on-one match race between opponents who, unlike in the individual pursuit, start next to each other. Men's sprint has been an Olympic event at every games except 1904 (which had races at seven different distances) and 1912 (which had no track cycling events). Women's sprints have been contested at every Olympics since 1988. Racing style Depending on the size of the velodrome, this event can be from 250 m to 1000 m. Unlike the sprints in athletics, these events do not usually start with riders sprinting from the starting line and they are not confined to lanes. The early parts of each race will often be highly tactical with riders pedalling slowly, as they carefully jockey for position, often trying to force their opponents up high on the track in an attempt to get their rivals to make the first move. Some even bring their bicycles to a complete stop, balanced upright with both feet still on the pedals and both hands on the handle bars (a track stand), in an attempt to make the other rider take the lead. Track stands can only be held for a certain time and it is not permissible to go backwards in a track stand by rocking backwards and forwards as the judge will be following the track stand from the bottom of the track. The reason for this behaviour, as in many track cycling events, is both aerodynamics and tactics. When racing at high speed, the rider who manages to stay just behind their opponent can draft, expending less effort. By riding behind the 'lead out' rider, the second rider reduces the aerodynamic drag felt. Just before the finish, the trailing rider pulls out of the slipstream, and aided by fresher legs, may be able to overtake the opponent before the line. To prevent this, the leading rider may choose to accelerate quickly before the last lap, hoping to catch their opponent off guard and establish a large enough gap to negate the aerodynamic effect or to keep the speed high enough to prevent their opponent from completing a pass. During the race, the lead out rider may choose to hug the measurement line on the inside of the track giving them the shortest path around the track. Likewise,