Bobsleigh began to be practiced as a sport in Switzerland in the late 19th century. Four-man bobsleigh(Men and/or Women) was officially adopted as an event from the 1st Olympic Winter Games, that were held in Chamonix, France in 1924. Two-man bobsleigh was added to the 1932 Olympic Winter Games held in Lake Placid, USA while woman's bobsleigh was only added to the 19th Olympic Winter Games held in Salt Lake City in 2002. In bobsleigh, athletes ride a steerable sled down an ice track. And there are three events comprised of 4-man bobsleigh, 2-man bobsleigh, and women´s bobsleigh. 2-person bobsleigh includes a pilot and a brakeman. The pilot uses the inner steering rope to drive the sled. And the brakeman puts on the brake to bring the sled to a halt after it has passed the finish line. 4-man bobsleigh adds two pushmen. Athletes take 4 heats in the world championship and the Olympic Games and the 4 heats total time decides the ranking. For bobsleigh, the track length is 1,200 to 1,500m long with an average slope of 8% to 15% while the curve radius is minimum 20m. The pressure an athlete feels while going around a curve is nearly four times the gravity, and the bobsleigh reaches an average maximum speed of 135Km an hour. It is important to glide around 14 to 22 curves on straight, curved, and circular segments of the track increasing the speed. An athlete cannot rack up a good score if the speed drops as the event is decided by one–hundredth of a second.