The world record in this event is Races commence with the firing of the starter's gun. Indoors, the race is run as one lap of the track, with only slightly slower times than outdoors. In the rare event that there are technical issues with a start, a green card is shown to all the athletes.
It was original double short sprint length at the Ancient Olympia distance, known as the Diaulos. In , a new development to the false start rule was added. The time is often used for American Football speed training. If the athlete is forced to run outside of his or her lane by another person, and no material advantage is gained, there will be no disqualification. Times are only recorded by an electronic timing system when both of these Photocells are simultaneously blocked. Junior girls in several countries run this distance instead of the metres. Because certain athletes could be disqualified for twitching in the starting blocks but some athletes could make a twitch without the starter noticing and disqualifying the athlete, it was decided that twitching in the starting block while being in the 'set' position would only carry a maximum penalty of a yellow card or a warning. Christie and his coach, Ron Roddan, both claimed that the false starts were due to Christie's exceptional reaction times being under the legal time. It was part of the Commonwealth Games up until and was the premier event in American high school sprinting until the NFHS changed to metric in , now only a secondary distance to the metres. In the event that the athlete is already on a warning the athlete is disqualified. The green card carries no penalty. Lanes[ edit ] The finish of the East German athletics championships For all Olympic sprint events, runners must remain within their pre-assigned lanes, which measure 1. Since races at this distance can last around six or seven seconds, having good reflexes and thus getting off to a quick start is more vital in this race than any other. Races commence with the firing of the starter's gun. It is popular for training and testing in other sports e. Currently the world's best for this event is Sprint training includes various running workouts, targeting acceleration, speed development, speed endurance, special endurance, and tempo endurance. To ensure that the sprinter's torso triggers the timing impulse at the finish line rather than an arm, foot, or other body part, a double Photocell is commonly used. The women's world record is The finish[ edit ] The first athlete whose torso reaches the vertical plane of the closest edge of the finish line is the winner. Since January , under IAAF rules, a single false start by an athlete results in disqualification. If an athlete is unhappy with track conditions after the "on your marks" command is given, the athlete must raise a hand before the "set" command and provide the Start referee with a reason. In order to instantly be disqualified for a false start, an athlete's hands must leave the track or their feet must leave the starting blocks, while the athlete is in their final 'set' position. Indoor distances are less standardized as many facilities run shorter or occasionally longer distances depending on available space. Additionally, athletes perform intense strength training workouts, as well as plyometric or jumping workouts.
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