Tai Ji Quan is considered to be one of the internal     styles of Chinese martial art, and is the most widely practiced martial art in the world     today. The term "Tai Ji" refers to the ancient Chinese cosmological concept of     the interplay between two opposite yet complementary forces (Yin and Yang) as being the     foundation of creation. "Quan" literally means, "fist" and denotes an     unarmed method of combat. Tai Ji Quan as a martial art is based on the principle of the     soft overcoming the hard.
     The origins of Tai Ji Quan are often attributed to one Zhang San     Feng (a Daoist of either the Twelfth or Fifteenth century depending on the source) who     created the Art after witnessing a fight between a snake and a crane. Although there is     evidence that Zhang San Feng actually existed, there is no historical evidence to support     the claim that he had anything to do with the creation or practice of Tai Ji Quan. These     stories were popularized in the early part of this century and were the result of     misinformation and the desire to connect the Art with a more famous and ancient personage.     All of the various styles of Tai Ji Quan which are in existence today can be traced back     to a single man, Chen Wang Ting, a general of the latter years of the Ming Dynasty. Chen     was a native of Chen Jia Gou, Wen County, in Henan Province. After the fall of the Ming     and the establishment of the Ching Dynasty (1644), Chen Wang Ting returned to the Chen     village and created his forms of boxing. Originally containing up to seven sets, only two     sets of Chen Style Tai Ji Quan have survived to the present.
     Originally, the Art was only taught let members of the Chen clan     until a promising young outsider

 named Yang Lu Chan was accepted as a student in the     early part of the Nineteenth century. After mastering the Art, Yang Lu Chan (nicknamed     "Yang without enemy" as he was reportedly a peerless fighter) modified the     original Chen style and created the Yang style of Tai Ji Quan, the most popular form     practiced in the world today. Wu Yu Xiang leaned the Art from Yang Lu Chan and a variation     of the original Chen form from Chen Ching Ping (who taught the 'small frame' version of     Chen Tai Ji Quan) and created the Wu style. A man named Hao Wei Zhen, learned the Wu style     from Wu Yu Xiang's nephew and taught the style to Sun Lu Tang, who in turn created the Sun     style (Sun was already an established master of Xing Yi Quan and Ba Gua Zhang when he     learned Tai Ji Quan. He combined his knowledge of the other arts when creating his style).     Yang Lu Chan had another student, a Manchu named Quan You, who in turned taught the Art to     his son, Wu Jian Quan. Wu Jian Quan popularized his variation of the Yang style, which is     commonly referred to as the Wu Jian Quan style. In recent times (this century) there have     been many other variations and modifications of the Art, but all may be traced back     through the above masters to the original Chen family forms.
      Complete Tai ji Quan arts include basic exercises, stance keeping     (Zhan Zhuang), repetitive single movement training, linked form training, power training     (exercises which train the ability to issue energy in a ballistic pulse), weapons training     (which includes straight sword, broadsword, staff and spear), technique training and     various two person exercises and drills (including "pushhands" sensitivity     drills). A hallmark of most styles of Tai Ji Quan is that the movements in the forms are     done quite slowly, with one posture flowing into the next without interruption. Some forms     (the old Chen forms for example) alternate between slow motion and explosive movements.     Other styles divide the training into forms which are done slowly at an even tempo and     separate forms which are performed at a more vigorous pace. The goal of moving slowly is     to insure correct attention is paid to proper body mechanics and the maintenance of the     prerequisite relaxation. Training exercises can be divided into two broad categories: solo     exercises, and drills which require a partner.
     A beginner will usually begin training with very basic exercises     designed to teach proper structural alignment and correct methods of moving the body,     shifting the weight, stepping, etc. All of the Tai Ji Quan arts have at their very     foundation the necessity of complete physical relaxation and the idea that the intent     leads and controls the motion of the body. The student will also be taught various stance     keeping postures which serve as basic exercises in alignment and relaxation as well as a     kind of mind calming standing meditation.
     A basic tenet of all internal martial arts is that correct motion     is born of absolute stillness. Once the basics are understood, the student will progress     to learning the formal patterns of movement (forms) which contain the specific movement     patterns and techniques inherent in the style.     
     Traditionally, single patterns of movement were learned and     repeated over and over until mastered, only then was the next pattern taught. Once the     student had mastered an entire sequence of movements individually, the movements were     taught in a linked sequence (a 'set'). The goal of training is to cultivate a kind of     'whole body' power. This refers to the ability to generate power with the entire body,     making full use of one's whole body mass in every movement. Power is always generated from     "the bottom up, meaning the powerful muscles of the legs and hip serve as the seat of     power. Using the strength of the relatively weaker arms and upper body is not emphasized.     The entire body is held in a state of dynamic relaxation which allows the power of the     whole body to flow out of the hands and into the opponent without obstruction. This is     described in the Tai Ji Quan Classics as "being rooted in the feet, developed by the     legs, directed by the waist transferred through the back and expressed in the     hands."The Tai Ji Quan arts have a variety of two person drills and exercises     designed to cultivate a high degree of sensitivity in the practitioner. Using brute force     or opposing another's power with power directly (double weighting) is strictly     discouraged. The goal of two person training is to develop sensitivity to the point that     one may avoid the opponent's power and apply one's own whole body power where the opponent     is most vulnerable. One must cultivate the ability to 'stick to the opponent, smothering     the others' power and destroying their balance.     
     The ability to "stick, adhere, continue and follow (zhan,     nian, lian, sui)" is vital to the application of Tai Ji Quan combat techniques, the     majority of which are grappling oriented. Techniques that include pushing, pulling,     wrapping, bumping, sweeping, locking, knocking down and throwing (grappling arts) far     outnumber striking and kicking techniques. Solo forms training is designed to develop the     ability to control oneself; paired practice trains the practitioner to apply the power     developed during solo training to another in the most efficient manner.     
     Modified forms of Tai Ji Quan for health have become popular     worldwide in recent times because the benefits of training have been found to be very     conducive to calming the mind, relaxing the body, relieving stress, and improving one's     health in general. However, it is important to realize that all traditional systems of Tai     Ji Quan were originally created for a single purpose, training the practitioner to fight.     
     Chen Wang Ting's original form of Chen style Tai Ji Quan is often     referred to as the "Old Frame" (Lao Jia) and its second form as "Cannon     Fist" (Pao Chui). In the latter part of the Eighteenth century, a fifth generation     descendant of Chen Wang Ting, Chen You Ben simplified the original forms into sets which     have come to be known as the "New Style" (Xin Jia). Chen You Ben's nephew, Chen     Ching Ping, created a variation of the New Style which is known as the "Small     Frame" (Xiao Jia) or "Zhao Bao" form. All of these styles have survived to     the present.     
     Smooth flowing movements punctuated by explosive strikes and kicks     characterize the Old Frame. There are many vigorous movements that involve jumping,     spinning while in the air, stamping the feet, and dropping the body low to the ground.     Technically, in addition to the explosive strikes and throws, the Chen style contains a     great number of Chin Na (joint locking and leverage) techniques. These techniques are a     remnant of the original weapons disarms popular on the ancient battlefields, and reflect     the warrior background of Chen Wang Ting, creator of the style.     
     The Yang style of Tai Ji Quan is a variation of the original Chen     style. The forms, which were passed down from the Yang style founder, Yang Lu Chan, have     undergone many modifications since his time. Yang Lu Chan's sons were very proficient     martial artists and each, in turn, modified their father's art. The most commonly seen     variation of the form found today comes from the version taught by Yang Lu Chan's     grandson, Yang Cheng Fu. It was Yang Cheng Fu who first popularized his family's art and     taught it openly. Yang Chen Fu's form is characterized by open and extended postures. Most     of the modern variations of the Yang style, as well as the standardized Mainland Chinese     versions of Tai Ji Quan are based on his variation of the Yang form.     
     Yang style Tai Ji Quan is characterized by soft, smooth and flowing     movements, which are relatively, even in tempo. The alternations of slow and quick     movements that are found in the Chen style sets have been separated in the Yang style.     Yang style Tai Ji Quan includes a 'long' or slow set in which all movements flow together     at an even pace, and a separate 'fast' form which includes quick and explosive movements.     Technically, the Yang styles include a great number of projections and takedowns. The vast     majority of Chin Na techniques practiced in the Chen style have been removed from the Yang     style.     
     Yang Lu Chan's student, Wu Yu Xiang combined Yang's form with the     Zhao Bao form, which he learned from Chen Ching Ping to create the Wu style. This style     features higher stances and compact, circular movements. His nephew's student, Hao Wei     Zhen was a famous practitioner of the style, so the style is sometimes referred to as the     Hao Style. Hao Wei Zhen taught his style to Sun Lu Tang, who combined his knowledge of     Xing Yi Quan and Ba Gua Zhang to create his own Sun style form. Smooth and compact     movements characterize Wu style Tai Ji Quan.     
     Each movement in a form progresses through four stages, Rise,     Support, Open and Close. Adept fighters of the Wu style are able to project an opponent     with very little overt movement. As stated above, Sun Lu Tang combined the Wu style with     elements of Xing Yi Quan and Ba Gua Zhang to create Sun style Tai Ji Quan. In general, Sun     style Tai Ji Quan follows the sequence of the Wu style, but the addition of the energies     of Xing Yi Quan and Ba Gua Zhang give the form a different flavor. Technically, Sun style     Tai Ji Quan has added the evasive body method of Ba Gua Zhang and the more overtly     'martial' techniques of Xing Yi Quan to the original technique base of Wu style Tai Ji     Quan.     
      Y
     Yang Lu Chan had another famous student named Quan     You, who in turn taught the style to his son Wu Jian Quan. This modification of the     original Yang style is usually referred to as the Wu Jian Quan style. This form's     movements are smaller and the stance is higher than the popular Yang style.     
      Wu Jian Quan style Tai Ji Quan is close to the Yang style in form     and movement. In general, the form is done with relatively smaller stances and a     characteristic forward lean of the torso in most of the movements. The Wu Jian Quan style     also contains 'slow' and 'fast' sets of forms. The practice of pushing hands is highly     developed in this style. It is also interesting to note that many of Wu Jian Quan's     original students have lived to very advanced age.     
     In summary, the major styles of traditional T'ai Chi Ch'uan are the     Chen, Yang, Wu, Wu Jian Ch'uan and Sun. All other "styles" are variations of the     above. Despite variations in form and technique, the underlying concepts of relaxed, whole     body power end the avoidance of using force against force are the foundations of all     styles of Tai Ji Quan. True Tai Ji Quan elevates the practice of common martial skills,     which primarily rely upon superior strength and speed, to the level of Art. As the     Classics say, "The ability to overcome a thousand pounds of pressure with a force of     four ounces is not due to superior strength, a man in his eighties who is able to defend     himself against multiple attackers is not relying upon superior speed."     
     Tai Ji Quan is a martial art is based on the principle of the soft     overcoming the hard. Direct opposition of another's force is strictly discouraged, and     great emphasis is placed upon borrowing the force of the opponent and using it to one's     own advantage. Belonging to the schools of the so-called "soft" martial arts,     Tai Ji Quan training is designed to cultivate a relaxed, flexible and sensitive body along     with a calm and focused intent. The Tai Ji Quan fighter is trained to absorb and     neutralize incoming force, join with the opponent by sticking to his center, and issue     force at the appropriate time and angle with the power of the entire body. By following     the principle of giving up the self and following others, the Tai Ji Quan fighter is able     to use an opponent's own strength against him, thereby allowing the weaker and slower to     overcome the stronger and faster opponent.     
     Another hallmark of Tai Ji Quan as a combat art is that it has, as     its foundation, the principle of natural movement. All the movements and techniques of the     Tai Ji Quan Arts are based upon natural strengths and reactions. Because training is less     a matter of conditioning new responses as refining inborn abilities, real fighting ability     can be cultivated in the Tai Ji Quan arts faster than most other styles of martial arts.     The diligent student of Tai Ji Quan, properly trained, will have acquired real self     defense ability in a matter of months, as opposed to the years of training required in     many other martial systems.     
     The primary combat strategy of Tai Ji Quan can be summed up in the     phrase "Entice (the opponent) to advance, (cause the opponent to) fall into     emptiness, unite (with the opponent) then throw (the opponent) out" [Yin jin, luo     kong, he ji chu]. Enticing the opponent to advance (advance refers to the opponent's     aggressive forward momentum) can be as simple as standing in front, presenting an open     target or launching a preemptive attack designed to draw a reaction. Enticing the opponent     into aggressive forward momentum has several advantages. Firstly, just like the arrow     released from the bow, a committed attack cannot change direction until its momentum is     spent. Such an attack affords the Tai Ji Quan fighter time and opportunity to gain the     superior position for effective counter attack. Secondly, a powerful, committed attack     almost invariably requires whole body motion. Once the opponent's whole body is in motion     (and his center of balance is in flux) it becomes possible to unbalance him with a     relatively small force (correctly applied). For example, it requires a relatively large     force to foot-sweep an upright and stationary opponent to the ground. However once the     opponent moves his center of mass forward as he takes a step, a sweep to the stepping foot     just before it touches the ground will send the opponent crashing to the ground with a     very slight effort. This type of technique is referred to as "Moving a thousand     pounds with a force of four ounces." Finally, enticing an opponent into aggressive     forward motion locks his mentality into the attack mode. With committed focus on     attacking, the opponent will be slow in changing to the defensive mind set as the Tai Ji     Quan fighter counterattacks. The opponent's reaction time is delayed, further increasing     the counterattacks odds of success; this allows the Tai Ji Quan fighter to "leave     after yet arrive first."     
     "Falling into emptiness"is analogous to the principle of never using force     against force. The Tai Ji Quan Classics state "Some have practiced tens of years but     are still defeated by others: this is because they have not recognized their illness of     double     
     What is the method that makes it possible to entice the opponent to     enter, cause him to fall into emptiness, unite with him and then throw him out? For that     matter, what separates Tai Ji Quan (or the internal/soft style) techniques from all other     types of techniques? The answer lies in one underlying skill; namely, the ability to     "stick adhere, continue and follow" [Zhan, nien, lian, sui]. Stick and Adhere     refer to connecting with the opponent in a soft and nonconfrontational manner and     maintaining this connection as you both move (blocking an opponent's incoming force     inevitably results in the opponent being knocked away. This makes it impossible to join     with the opponent and one is doomed to remaining double weighted). Continue and Follow     refer to "giving up oneself and following the other" by continuously following     the opponent's movement and changes in order to maintain your connection. In this     Situation, you may constantly monitor the opponent's actions and intent while seeking the     time and opportunity to join with and lead his center, thereby bringing him under your     control.     
     One may ask, "what exactly are we sticking to and     following?" Do we stick to the opponent's arms? His torso? The answer is we stick to     the opponent's center of gravity (his pelvic region). In Tai Ji Quan technique this is     rarely achieved by direct contact (a useful example to help understand the concept of     sticking to and controlling an opponent's center is the wrestler, who routinely sticks to     his opponent's center directly, as when applying the popular bear hug). Most often, the     Tai Ji Quan fighter will seek to stick to and control the opponent's center through     contact with his arms and/or upper torso, using these regions as handles to the opponent's     center. In order to maintain control of the opponent’s center, the point of contact     with the opponent will often change in the course of an exchange. The ability to stick,     follow and control an opponent's center in the midst of motion is cultivated in the     various push hands drills found in all styles of Tai Ji Quan.     
     The Techniques of Tai Ji Quan are primarily grappling oriented.     Although practitioners are trained to strike with all parts of the body, purely percussive     techniques (strikes designed to cause local tissue damage) are far less common than the     grappling oriented techniques which include pushing, pulling, twisting, sweeping, locking,     throwing and knocking. Techniques such as these are designed to control the opponent's     center and displace him in space.     
     All Tai Ji Quan techniques are combinations of the energies of the     Eight Techniques: ward off, roll back, press, push, pluck, split, elbow and body stroke     [peng, lu, ji, an, cai, lie, zhou, kao]. In its broadest sense, ward off energy can he     applied to the whole body. It is the energy resulting from proper alignment and relaxation     which gives the Tai Ji Quan fighter the elasticity and springiness necessary to fight. In     a stricter, technical sense, ward off is the energy which supplies buoyancy and supports     weight (as soft and flexible water is able to support a massive ship). Roll back is energy     which moves incoming force past one's body toward the rear (as a revolving door gives way     and pivots around its center). Press is the force which rebounds from the ground up in a     pulse and bounces the opponent away from the body (as a rock bounces off the taught head     of a drum). Push is a force which puts pressure downward (like the force used when you     lift your body out of a pool by pressing the palms down on the outside deck). Pluck is a     sudden, downward jerking force towards the rear of one's own body (like the force used to     pluck an apple from a tree). Split is the energy of coupling (force applied in parallel     but opposite directions which causes a rotation around their center point); it is the     force generated when you turn a steering wheel with both hands on the sides of the wheel.     Elbow is whole body ward off power focused through the elbow (think of closing a car door     with your elbow when your hands are full). Body stroke is whole body ward off power     channeled through some part of the torso, usually the shoulder (think of breaking a door     down by leaning into it with your shoulder). All the various techniques of Tai Ji Quan,     including throwing, locking, kicking and striking, are combinations of these eight     energies.