Editing American Quarter Horse (section)

===Racing and hunter type===
[[File:Flexion-at-poll.jpg|thumb|A Quarter Horse warming up for hunt seat competition]]
Quarter Horse [[Horse racing|race horses]] are bred to sprint short distances ranging from 220 to 870 yards. Thus, they have long legs and are leaner than their stock type counterparts, but are still characterized by muscular hindquarters and powerful legs. Quarter Horses race primarily against other Quarter Horses, and their sprinting ability has earned them the nickname, "the world's fastest athlete."<ref>{{Cite book|title=The American quarter horse|last=Ellen.|first=Frazel|date=2012|publisher=Bellwether Media|isbn=978-1612115436|location=Minneapolis, MN|oclc=794554681}}</ref> The [[show hunter]] type is slimmer, even more closely resembling a [[Thoroughbred]], usually reflecting a higher percentage of appendix breeding. They are shown in hunter/jumper classes at both breed shows and in open [[United States Equestrian Federation|USEF]]-rated [[horse show]] competition.<ref>{{Cite book |last=Baxter |first=Gary M. |title=Adams and Stashak's Lameness in Horses |date=2011 |publisher=Wiley |isbn=9780470961773 |edition=6th |location=Somerset |pages=Chapter 2 |oclc=927499663}}</ref>