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Donnie Yen (born 27 July 1963) Yen was born in Guangzhou, China. also known as Yen Ji-dan, is a Hong Kong actor, Chinese martial artist. Films 1983 Shaolin Drunkard 1984 Drunken Tai Chi 1985 Mismatched Couples 1988 Tiger Cage 1989 In the Line of Duty 4: Witness 1990 Tiger Cage 2 1991 Holy Virgin vs. the Evil Dead Crystal Hunt 1992 Cheetah on Fire Once Upon a Time in China II New Dragon Gate Inn 1993 Iron Monkey Butterfly and Sword Hero Among Heroes 1994 Wing Chun Circus Kid 1995 Iron Monkey 2 The Saint of Gamblers 1996 Satan Returns 1997 Legend of the Wolf High Voltage Black Rose 2 1998 Ballistic Kiss Shanghai Affairs 1999 City of Darkness Moonlight Express 2000 Highlander: Endgame 2001 The Princess Blade 2002 Blade II Hero 2003 Shanghai Knights The Twins Effect 2004 The Twins Effect II Protege de la Rose Noire Love on the Rocks 2005 SPL: Sha Po Lang Seven Swords 2006 Stormbreaker Dragon Tiger Gate 2007 Flash Point 2008 An Empress and the Warriors Painted Skin Ip Man 2009 All’s Well, Ends Well 2009 The Founding of a Republic Bodyguards and Assassins 2010 14 Blades Ip Man 2 Legend of the Fist: The Return of Chen Zhen 2011 All’s Well, Ends Well 2011 The Lost Bladesman Wu Xia 2012 All’s Well, Ends Well 2012 2013 Together Special ID 2014 Golden Chicken 3 The Monkey King Iceman Kung Fu Jungle 2015 An Inspector Calls Ip Man 3 2016 Crouching Tiger, Hidden Dragon: Sword of Destiny Iceman II Rogue One: A Star Wars Story 2017 XXX: Return of Xander Cage Chasing the Dragon American Revenge Yen is credited by many for contributing to the popularization of the traditional martial arts style known as Wing Chun. Yen’s mother, Bow-sim Mark, is a Fu Style Wudangquan and Tai Chi grandmaster, while his father, Klyster Yen, is a newspaper editor. When he was two years old, his family moved to Hong Kong, and then to Boston when he was 11. His younger sister, Chris Yen. Yen developed an interest in martial arts and began experimenting with various styles, including t’ai chi and other traditional Chinese martial arts. Yen then started karate when he was nine. Yen focused on practicing wushu seriously at the age of fourteen after dropping out of school. He to Beijing on a two-year training program with the Beijing Wushu Team. Yen finally started taekwondo at around the age of sixteen. (y) #donnieyen #donnie #yen

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Boxing Technique Stance The modern boxing stance differs substantially from the typical boxing stances of the 19th and early 20th centuries. The modern stance has a more upright vertical-armed guard, as opposed to the more horizontal, knuckles-facing-forward guard adopted by early 20th century hook users such as Jack Johnson. Upright stance Semi-crouch Full crouch In a fully upright stance, the boxer stands with the legs shoulder-width apart and the rear foot a half-step in front of the lead man. Right-handed or orthodox boxers lead with the left foot and fist (for most penetration power). Both feet are parallel, and the right heel is off the ground. The lead (left) fist is held vertically about six inches in front of the face at eye level. The rear (right) fist is held beside the chin and the elbow tucked against the ribcage to protect the body. The chin is tucked into the chest to avoid punches to the jaw which commonly cause knock-outs and is often kept slightly off-center. Wrists are slightly bent to avoid damage when punching and the elbows are kept tucked in to protect the ribcage. Some boxers fight from a crouch, leaning forward and keeping their feet closer together. The stance described is considered the "textbook" stance and fighters are encouraged to change it around once it's been mastered as a base. Case in point, many fast fighters have their hands down and have almost exaggerated footwork, while brawlers or bully fighters tend to slowly stalk their opponents. Left-handed or southpaw fighters use a mirror image of the orthodox stance, which can create problems for orthodox fighters unaccustomed to receiving jabs, hooks, or crosses from the opposite side. The southpaw stance, conversely, is vulnerable to a straight right hand. North American fighters tend to favor a more balanced stance, facing the opponent almost squarely, while many European fighters stand with their torso turned more to the side. The positioning of the hands may also vary, as some fighters prefer to have both hands raised in front of the face, risking exposure to body shots. Modern boxers can sometimes be seen tapping their cheeks or foreheads with their fists in order to remind themselves to keep their hands up (which becomes difficult during long bouts). Boxers are taught to push off with their feet in order to move effectively. Forward motion involves lifting the lead leg and pushing with the rear leg. Rearward motion involves lifting the rear leg and pushing with the lead leg. During lateral motion the leg in the direction of the movement moves first while the opposite leg provides the force needed to move the body. Punches There are four basic punches in boxing: the jab, cross, hook and uppercut. Any punch other than a jab is considered a power punch. If a boxer is right-handed (orthodox), his left hand is the lead hand and his right hand is the rear hand. For a left-handed boxer or southpaw, the hand positions are reversed. For clarity, the following discussion will assume a right-handed boxer. Jab Cross - in counter-punch with a looping Hook Uppercut Jab – A quick, straight punch thrown with the lead hand from the guard position. The jab is accompanied by a small, clockwise rotation of the torso and hips, while the fist rotates 90 degrees, becoming horizontal upon impact. As the punch reaches full extension, the lead shoulder can be brought up to guard the chin. The rear hand remains next to the face to guard the jaw. After making contact with the target, the lead hand is retracted quickly to resume a guard position in front of the face. The jab is recognized as the most important punch in a boxer's arsenal because it provides a fair amount of its own cover and it leaves the least amount of space for a counter punch from the opponent. It has the longest reach of any punch and does not require commitment or large weight transfers. Due to its relatively weak power, the jab is often used as a tool to gauge distances, probe an opponent's defenses, harass an opponent, and set up heavier, more powerful punches. A half-step may be added, moving the entire body into the punch, for additional power. Some notable boxers who have been able to develop relative power in their jabs and use it to punish or 'wear down' their opponents to some effect include Larry Holmes and Wladimir Klitschko. Cross – A powerful, straight punch thrown with the rear hand. From the guard position, the rear hand is thrown from the chin, crossing the body and traveling towards the target in a straight line. The rear shoulder is thrust forward and finishes just touching the outside of the chin. At the same time, the lead hand is retracted and tucked against the face to protect the inside of the chin. For additional power, the torso and hips are rotated counter-clockwise as the cross is thrown. A measure of an ideally extended cross is that the shoulder of the striking arm, the knee of the front leg and the ball of the front foot are on the same vertical plane.[33] Weight is also transferred from the rear foot to the lead foot, resulting in the rear heel turning outwards as it acts as a fulcrum for the transfer of weight. Body rotation and the sudden weight transfer is what gives the cross its power. Like the jab, a half-step forward may be added. After the cross is thrown, the hand is retracted quickly and the guard position resumed. It can be used to counter punch a jab, aiming for the opponent's head (or a counter to a cross aimed at the body) or to set up a hook. The cross is also called a "straight" or "right", especially if it does not cross the opponent's outstretched jab. Hook – A semi-circular punch thrown with the lead hand to the side of the opponent's head. From the guard position, the elbow is drawn back with a horizontal fist (knuckles pointing forward) and the elbow bent. The rear hand is tucked firmly against the jaw to protect the chin. The torso and hips are rotated clockwise, propelling the fist through a tight, clockwise arc across the front of the body and connecting with the target. At the same time, the lead foot pivots clockwise, turning the left heel outwards. Upon contact, the hook's circular path ends abruptly and the lead hand is pulled quickly back into the guard position. A hook may also target the lower body and this technique is sometimes called the "rip" to distinguish it from the conventional hook to the head. The hook may also be thrown with the rear hand. Notable left hookers include Joe Frazier , Roy Jones Jr. and Mike Tyson. Uppercut – A vertical, rising punch thrown with the rear hand. From the guard position, the torso shifts slightly to the right, the rear hand drops below the level of the opponent's chest and the knees are bent slightly. From this position, the rear hand is thrust upwards in a rising arc towards the opponent's chin or torso. At the same time, the knees push upwards quickly and the torso and hips rotate anti-clockwise and the rear heel turns outward, mimicking the body movement of the cross. The strategic utility of the uppercut depends on its ability to "lift" the opponent's body, setting it off-balance for successive attacks. The right uppercut followed by a left hook is a deadly combination employing the uppercut to lift the opponent's chin into a vulnerable position, then the hook to knock the opponent out. These different punch types can be thrown in rapid succession to form combinations or "combos." The most common is the jab and cross combination, nicknamed the "one-two combo." This is usually an effective combination, because the jab blocks the opponent's view of the cross, making it easier to land cleanly and forcefully. A large, swinging circular punch starting from a cocked-back position with the arm at a longer extension than the hook and all of the fighter's weight behind it is sometimes referred to as a "roundhouse," "haymaker," or sucker-punch. Relying on body weight and centripetal force within a wide arc, the roundhouse can be a powerful blow, but it is often a wild and uncontrolled punch that leaves the fighter delivering it off balance and with an open guard. Wide, looping punches have the further disadvantage of taking more time to deliver, giving the opponent ample warning to react and counter. For this reason, the haymaker or roundhouse is not a conventional punch, and is regarded by trainers as a mark of poor technique or desperation. Sometimes it has been used, because of its immense potential power, to finish off an already staggering opponent who seems unable or unlikely to take advantage of the poor position it leaves the puncher in. Another unconventional punch is the rarely used bolo punch, in which the opponent swings an arm out several times in a wide arc, usually as a distraction, before delivering with either that or the other arm. An illegal punch to the back of the head or neck is known as a rabbit punch. Defense There are several basic maneuvers a boxer can use in order to evade or block punches, depicted and discussed below. Slipping Bobbing Blocking (with the arms) Cover-Up (with the gloves) Clinching Footwork Pulling away Slip – Slipping rotates the body slightly so that an incoming punch passes harmlessly next to the head. As the opponent's punch arrives, the boxer sharply rotates the hips and shoulders. This turns the chin sideways and allows the punch to "slip" past. Muhammad Ali was famous for extremely fast and close slips, as was an early Mike Tyson. Sway or fade – To anticipate a punch and move the upper body or head back so that it misses or has its force appreciably lessened. Also called "rolling with the punch" or " Riding The Punch". Duck or break – To drop down with the back straight so that a punch aimed at the head glances or misses entirely. Bob and weave – Bobbing moves the head laterally and beneath an incoming punch. As the opponent's punch arrives, the boxer bends the legs quickly and simultaneously shifts the body either slightly right or left. Once the punch has been evaded, the boxer "weaves" back to an upright position, emerging on either the outside or inside of the opponent's still-extended arm. To move outside the opponent's extended arm is called "bobbing to the outside". To move inside the opponent's extended arm is called "bobbing to the inside". Joe Frazier, Jack Dempsey, Mike Tyson and Rocky Marciano were masters of bobbing and weaving. Parry/block – Parrying or blocking uses the boxer's shoulder, hands or arms as defensive tools to protect against incoming attacks. A block generally receives a punch while a parry tends to deflect it. A "palm", "catch", or "cuff" is a defense which intentionally takes the incoming punch on the palm portion of the defender's glove. The cover-up – Covering up is the last opportunity (other than rolling with a punch) to avoid an incoming strike to an unprotected face or body. Generally speaking, the hands are held high to protect the head and chin and the forearms are tucked against the torso to impede body shots. When protecting the body, the boxer rotates the hips and lets incoming punches "roll" off the guard. To protect the head, the boxer presses both fists against the front of the face with the forearms parallel and facing outwards. This type of guard is weak against attacks from below. The clinch – Clinching is a form of trapping or a rough form of grappling and occurs when the distance between both fighters has closed and straight punches cannot be employed. In this situation, the boxer attempts to hold or "tie up" the opponent's hands so he is unable to throw hooks or uppercuts. To perform a clinch, the boxer loops both hands around the outside of the opponent's shoulders, scooping back under the forearms to grasp the opponent's arms tightly against his own body. In this position, the opponent's arms are pinned and cannot be used to attack. Clinching is a temporary match state and is quickly dissipated by the referee. Clinching is technically against the rules, and in amateur fights points are deducted fairly quickly for it. It is unlikely, however, to see points deducted for a clinch in professional boxing. Less common strategies The "rope-a-dope" strategy : Used by Muhammad Ali in his 1974 "the Rumble in the Jungle" bout against George Foreman, the rope-a-dope method involves lying back against the ropes, covering up defensively as much as possible and allowing the opponent to attempt numerous punches. The back-leaning posture, which does not cause the defending boxer to become as unbalanced as he would during normal backward movement, also maximizes the distance of the defender's head from his opponent, increasing the probability that punches will miss their intended target. Weathering the blows that do land, the defender lures the opponent into expending energy while conserving his/her own. If successful, the attacking opponent will eventually tire, creating defensive flaws which the boxer can exploit. In modern boxing, the rope-a-dope is generally discouraged since most opponents are not fooled by it and few boxers possess the physical toughness to withstand a prolonged, unanswered assault. Recently, however, eight-division world champion Manny Pacquiao skillfully used the strategy to gauge the power of welterweight titlist Miguel Cotto in November 2009. Pacquiao followed up the rope-a-dope gambit with a withering knockdown. Bolo punch : Occasionally seen in Olympic boxing, the bolo is an arm punch which owes its power to the shortening of a circular arc rather than to transference of body weight; it tends to have more of an effect due to the surprise of the odd angle it lands at rather than the actual power of the punch. This is more of a gimmick than a technical maneuver; this punch is not taught, being on the same plane in boxing technicality as is the Ali shuffle. Nevertheless, a few professional boxers have used the bolo-punch to great effect, including former welterweight champions Sugar Ray Leonard, and Kid Gavilan. Middleweight champion Ceferino Garcia is regarded as the inventor of the bolo punch. Overhand right : The overhand right is a punch not found in every boxer's arsenal. Unlike the right cross, which has a trajectory parallel to the ground, the overhand right has a looping circular arc as it is thrown over the shoulder with the palm facing away from the boxer. It is especially popular with smaller stature boxers trying to reach taller opponents. Boxers who have used this punch consistently and effectively include former heavyweight champions Rocky Marciano and Tim Witherspoon, as well as MMA champions Chuck Liddell and Fedor Emelianenko. The overhand right has become a popular weapon in other tournaments that involve fist striking. Check hook : A check hook is employed to prevent aggressive boxers from lunging in. There are two parts to the check hook. The first part consists of a regular hook. The second, trickier part involves the footwork. As the opponent lunges in, the boxer should throw the hook and pivot on his left foot and swing his right foot 180 degrees around. If executed correctly, the aggressive boxer will lunge in and sail harmlessly past his opponent like a bull missing a matador. This is rarely seen in professional boxing as it requires a great disparity in skill level to execute. Technically speaking it has been said that there is no such thing as a check hook and that it is simply a hook applied to an opponent that has lurched forward and past his opponent who simply hooks him on the way past. Others have argued that the check hook exists but is an illegal punch due to it being a pivot punch which is illegal in the sport. Floyd Mayweather, Jr. employed the use of a check hook against Ricky Hatton, which sent Hatton flying head first into the corner post and being knocked down.

Boxing Rules The Marquess of Queensberry rules have been the general rules governing modern boxing since their publication in 1867. A boxing match typically consists of a determined number of three-minute rounds, a total of up to 9 to 12 rounds. A minute is typically spent between each round with the fighters in their assigned corners receiving advice and attention from their coach and staff. The fight is controlled by a referee who works within the ring to judge and control the conduct of the fighters, rule on their ability to fight safely, count knocked-down fighters, and rule on fouls. Up to three judges are typically present at ringside to score the bout and assign points to the boxers, based on punches that connect, defense, knockdowns, and other, more subjective, measures. Because of the open-ended style of boxing judging, many fights have controversial results, in which one or both fighters believe they have been "robbed" or unfairly denied a victory. Each fighter has an assigned corner of the ring, where his or her coach, as well as one or more "seconds" may administer to the fighter at the beginning of the fight and between rounds. Each boxer enters into the ring from their assigned corners at the beginning of each round and must cease fighting and return to their corner at the signaled end of each round. A bout in which the predetermined number of rounds passes is decided by the judges, and is said to "go the distance". The fighter with the higher score at the end of the fight is ruled the winner. With three judges, unanimous and split decisions are possible, as are draws. A boxer may win the bout before a decision is reached through a knock-out ; such bouts are said to have ended "inside the distance". If a fighter is knocked down during the fight, determined by whether the boxer touches the canvas floor of the ring with any part of their body other than the feet as a result of the opponent's punch and not a slip, as determined by the referee, the referee begins counting until the fighter returns to his or her feet and can continue. Should the referee count to ten, then the knocked-down boxer is ruled "knocked out" (whether unconscious or not) and the other boxer is ruled the winner by knockout (KO). A "technical knock-out" (TKO) is possible as well, and is ruled by the referee, fight doctor, or a fighter's corner if a fighter is unable to safely continue to fight, based upon injuries or being judged unable to effectively defend themselves. Many jurisdictions and sanctioning agencies also have a "three-knockdown rule", in which three knockdowns in a given round result in a TKO. A TKO is considered a knockout in a fighter's record. A "standing eight" count rule may also be in effect. This gives the referee the right to step in and administer a count of eight to a fighter that he feels may be in danger, even if no knockdown has taken place. After counting the referee will observe the fighter, and decide if he is fit to continue. For scoring purposes, a standing eight count is treated as a knockdown. In general, boxers are prohibited from hitting below the belt, holding, tripping, pushing, biting, or spitting. The boxer's shorts are raised so the opponent is not allowed to hit to the groin area with intent to cause pain or injury. Failure to abide by the former may result in a foul. They also are prohibited from kicking, head-butting, or hitting with any part of the arm other than the knuckles of a closed fist (including hitting with the elbow, shoulder or forearm, as well as with open gloves, the wrist, the inside, back or side of the hand). They are prohibited as well from hitting the back, back of the neck or head (called a "rabbit-punch") or the kidneys. They are prohibited from holding the ropes for support when punching, holding an opponent while punching, or ducking below the belt of their opponent (dropping below the waist of your opponent, no matter the distance between). If a "clinch" – a defensive move in which a boxer wraps his or her opponents arms and holds on to create a pause – is broken by the referee, each fighter must take a full step back before punching again (alternatively, the referee may direct the fighters to "punch out" of the clinch). When a boxer is knocked down, the other boxer must immediately cease fighting and move to the furthest neutral corner of the ring until the referee has either ruled a knockout or called for the fight to continue. Violations of these rules may be ruled "fouls" by the referee, who may issue warnings, deduct points, or disqualify an offending boxer, causing an automatic loss, depending on the seriousness and intentionality of the foul. An intentional foul that causes injury that prevents a fight from continuing usually causes the boxer who committed it to be disqualified. A fighter who suffers an accidental low-blow may be given up to five minutes to recover, after which they may be ruled knocked out if they are unable to continue. Accidental fouls that cause injury ending a bout may lead to a "no contest" result, or else cause the fight to go to a decision if enough rounds (typically four or more, or at least three in a four-round fight) have passed. Unheard of these days, but common during the early 20th Century in North America, a "newspaper decision (NWS)" might be made after a no decision bout had ended. A "no decision" bout occurred when, by law or by pre-arrangement of the fighters, if both boxers were still standing at the fight's conclusion and there was no knockout, no official decision was rendered and neither boxer was declared the winner. But this did not prevent the pool of ringside newspaper reporters from declaring a consensus result among themselves and printing a newspaper decision in their publications. Officially, however, a "no decision" bout resulted in neither boxer winning or losing. Boxing historians sometimes use these unofficial newspaper decisions in compiling fight records for illustrative purposes only. Often, media outlets covering a match will personally score the match, and post their scores as an independent sentence in their report.

Taekwondo Styles and Organizations There are a number of major taekwondo styles as well as a few niche styles. Most styles are associated with a governing body or federation that defines the style. The major technical differences among taekwondo styles and organizations generally revolve around: the patterns practiced by each style (called hyeong ?, pumsae ??, or teul ?, depending on the style); these are sets of prescribed formal sequences of movements that demonstrate mastery of posture, positioning, and technique differences in the sparring rules for competition; specifically, WTF-style competition (the style used in the Olympics) is generally more sport-oriented and less combat-oriented than other styles martial arts philosophy. 1946: Traditional taekwondo The term traditional taekwon typically refers to martial arts practiced in Korea during the 1940s and 1950s by the nine original kwans after the conclusion of the Japanese occupation of Korea at the end of World War II. The term taekwondo had not yet been coined. In reality, each of the nine kwans practiced its own style of martial arts, so the term traditional taekwondo serves as an umbrella term for these various styles. Traditional taekwondo is still studied today in addition to traditional Korean martial arts styles such as Tang Soo Do and Soo Bahk Do. The original schools (kwans) that formed the organization that would eventually become Kukkiwon continue to exist as independent fraternal membership organizations that support the World Taekwondo Federation and Kukkiwon. The official curriculum of the kwans is that of Kukkiwon. The kwans also function as a channel for the issuing of Kukkiwon dan and poom certification (black belt ranks) for their members. 1966: ITF/Chang Hon-style taekwondo International Taekwon-Do Federation (ITF)-style taekwondo, more accurately known as Chang Hon-style taekwondo, is defined by Choi Hong Hi's Encyclopedia of Taekwon-do published in 1987. In 1990, the Global Taekwondo Federation (GTF) split from the ITF due to the political controversies surrounding the ITF; the GTF continues to practice ITF-style taekwondo, however, with additional elements incorporated into the style. Likewise, the ITF itself split in 2001 and again in 2002 into three separate federations, headquartered in Austria, the United Kingdom, and Spain respectively. The GTF and all three ITFs practice Choi's ITF-style taekwondo. In ITF-style taekwondo, the word used for "forms" is teul; the specific set of teul used by the ITF is called Chang Hon. Choi defined 24 Chang Hon teul. The names and symbolism of the Chang Hon teul refer to elements of Korean history, culture and religious philosophy. The GTF-variant of ITF practices an additional six teul. Within the ITF taekwon-do tradition there are two sub-styles: The style of taekwon-do practiced by the ITF before its 1973 split with the KTA is sometimes called by ITF practitioners "traditional taekwon-do", though a more accurate term would be traditional ITF taekwon-do. After the 1973 split, Choi Hong Hi continued to develop and refine the style, ultimately publishing his work in his 1987 Encyclopedia of Taekwondo. Among the refinements incorporated into this new sub-style is the "sine wave"; one of Choi Hong Hi's later principles of taekwondo is that the body's center of gravity should be raised-and-lowered throughout a movement. Some ITF schools adopt the sine wave style, while others do not. Essentially all ITF schools do, however, use the patterns (teul) defined in the Encyclopedia, with some exceptions related to the forms Juche and Ko-Dang. 1969: ATA/Songahm-style taekwondo In 1969, Haeng Ung Lee, a former taekwondo instructor in the South Korean military, relocated to Omaha, Nebraska and established a chain of martial arts schools in the United States under the banner of the American Taekwondo Association (ATA). Like Jhoon Rhee taekwondo, ATA taekwondo has its roots in traditional taekwondo. The style of taekwondo practiced by the ATA is called Songahm taekwondo. The ATA went on to become one of the largest chains of taekwondo schools in the United States. The ATA has established international spin-offs called the Songahm Taekwondo Federation (STF) and the World Traditional Taekwondo Union (WTTU) to promote the practice of Songahm taekwondo internationally. 1970s: Jhoon Rhee-style taekwondo In 1962 Jhoon Rhee relocated to the United States and established a chain of martial arts schools primarily in the Washington, D.C. area that practiced traditional taekwondo. In the 1970s, at the urging of Choi Hong Hi, Rhee adopted ITF-style taekwondo within his chain of schools, but like the GTF later departed from the ITF due to the political controversies surrounding Choi and the ITF. Rhee went on to develop his own style of taekwondo called Jhoon Rhee-style taekwondo, incorporating elements of both traditional and ITF-style taekwondo as well as original elements. (Note that Jhoon Rhee-style taekwondo is distinct from the similarly named Rhee Taekwon-Do.) Jhoon Rhee-style taekwondo is still practiced primarily in the United States and eastern Europe. 1972: Kukkiwon/WTF-style taekwondo In 1972 the Korea Taekwondo Association (KTA) Central Dojang opened in Seoul in 1972; in 1973 the name was changed to Kukkiwon. Under the sponsorship of the South Korean government's Ministry of Culture, Sports and Tourism the Kukkiwon became the new national academy for taekwondo, thereby establishing a new "unified" style of taekwondo. In 1973 the KTA established the World Taekwondo Federation (WTF) to promote taekwondo as a sport. The International Olympic Committee recognized the WTF and taekwondo sparring in 1980. For this reason, Kukkiwon-style taekwondo is sometimes referred to as Sport-style taekwondo, Olympic-style taekwondo, or WTF-style taekwondo, though technically the style itself is defined by the Kukkiwon, not the WTF. In Kukkiwon/WTF-style taekwondo, the word used for "forms" is poomsae. In 1967 the KTA established a new set of forms called the Palgwae poomse, named after the eight trigrams of the I Ching. In 1971 however (after additional kwans had joined the KTA), the KTA and Kukkiwon adopted a new set of color-belt forms instead, called the Taegeuk poomsae. Black belt forms are called yudanja poomsae. While ITF-style forms refer to key elements of Korean history, Kukkwon/WTF-style forms refer instead to elements of sino-Korean philosophy such as the I Ching and the taegeuk. WTF-sanctioned tournaments allow any person, regardless of school affiliation or martial arts style, to compete in WTF events as long as he or she is a member of the WTF Member National Association in his or her nation; this allows essentially anyone to compete in WTF-sanctioned competitions. Other styles and hybrids As previously mentioned, in 1990 the Global Taekwondo Federation (GTF) split from the International Taekwon-Do Federation (ITF) to form its own style of taekwondo based on ITF-style. Essentially this can be considered a variation of ITF-style. Also in 1990, martial artist and actor Chuck Norris, an alumnus of Hwang Kee's Moo Duk Kwan organization, established a hybrid martial art system called Chun Kuk Do. Chun Kuk Do shares many techniques, forms and names with Tang Soo Do and Taekwondo, and so can be considered a variation of traditional taekwondo. Similarly, Lim Ching Sing's Hup Kwon Do and Kwang-jo Choi's Choi Kwang Do also derive from taekwondo. Additionally, there are hybrid martial arts that combine taekwondo with other styles. These include: Gwon Gyokdo - combines taekwondo and muay thai. Han Moo Do - Scandinavian martial art that combines taekwondo, hapkido, and hoi jeon moo sool. Han Mu Do - Korean martial art that combines taekwondo and hapkido. Teukgong Moosool - Korean martial art that combines elements of taekwondo, hapkido, judo, kyuk too ki, and Chinese martial arts. Yongmudo - developed at Korea's Yong-In University, combines taekwondo, hapkido, judo, and ssireum.