Slalom skiing

Slalom is an alpine skiing and alpine snowboarding discipline, involving skiing between poles or gates. These are spaced more closely than those in giant slalom, super giant slalom and downhill, necessitating quicker and shorter turns. Internationally, the sport is contested at the FIS Alpine World Ski Championships, and at the Olympic Winter Games.

The term slalom comes from the Morgedal/Seljord dialect of the Norwegian word "slalåm": "sla", meaning "slightly inclining hillside", and "låm", meaning "track after skis". The inventors of modern skiing classified their trails according to their difficulty:

A Norwegian military downhill competition in 1767 included racing downhill among trees "without falling or breaking skis". Sondre Norheim and other skiers from Telemark practiced uvyrdslåm or "disrespectful/reckless downhill" where they raced downhill in difficult and untested terrain (i.e., off piste). The 1866 "ski race" in Oslo was a combined cross-country, jumping and slalom competition. In the slalom participants were allowed use poles for braking and steering, and they were given points for style (appropriate skier posture). During the late 19th century Norwegian skiers participated in all branches (jumping, slalom, and cross-country) often with the same pair of skis. Slalom and variants of slalom were often referred to as hill races. Around 1900 hill races were abandoned in the Oslo championships at Huseby and Holmenkollen. Mathias Zdarsky's development of the Lilienfeld binding helped change hill races into a specialty of the Alps region.

The rules for the modern slalom were developed by Arnold Lunn in 1922 for the British National Ski Championships, and adopted for alpine skiing at the 1936 Winter Olympics. Under these rules gates were marked by pairs of flags rather than single ones, were arranged so that the racers had to use a variety of turn lengths to negotiate them, and scoring was on the basis of time alone, rather than on both time and style.

A course is constructed by laying out a series of gates, formed by alternating pairs of red and blue poles. The skier must pass between the two poles forming the gate, with the tips of both skis and the skier's feet passing between the poles. A course has 55 to 75 gates for men and 40 to 60 for women. The vertical drop for a men's course is 180 to 220 m (591 to 722 ft) and measures slightly less for women. The gates are arranged in a variety of configurations to challenge the competitor.

Traditionally, bamboo poles were used for gates, the rigidity of which forced skiers to maneuver their entire body around each gate. In the early 1980s, rigid poles were replaced by hard plastic poles, hinged at the base. The hinged gates require, according to FIS rules, only that the skis and boots of the skier go around each gate.

The new gates allow a more direct path down a slalom course through the process of cross-blocking or shinning the gates. Cross-blocking is a technique in which the legs go around the gate with the upper body inclined toward, or even across, the gate; in this case the racer's outside pole and shinguards hit the gate, knocking it down and out of the way. Cross-blocking is done by pushing the gate down with the arms, hands, or shins. By 1989, most of the top technical skiers in the world had adopted the cross-block technique.

If both feet and ski tips have not crossed the gate line, a fault is committed. This could be due to a straddle or other factors.