Nei Jin

Nèi Jìn or Nèi Jìng ( _zh. 內勁) is the Chinese term for the "internal power" associated with Chinese martial arts.Theoretically the opposite of brute muscular force, "nèi jìn" should be characterized by softness, elasticity, and flexibility.When "nèi jìn" is successfully exerted, body and breathing supposedly work together as a single unit, with no wasted effort anywhere in the musculature.

Proponents of "nèi jìn" claim that as one ages the power of muscles expanding and contracting in tension gradually decreases but coordinated "nèi jìn" and its resulting leverage will increase with time if it is cultivated assiduously. This power is allegedly unique to the internal martial arts of China and rarely found in other martial arts, if at all, although different schools define the term differently.

Nèi jìn is developed by using "nèigōng" (內功), or "internal exercises," as opposed to "wài gōng" (外功), "external exercises." Also, many internal styles use pushing hands as a way to train the principles. A famous application of nèi jìn is the "fā jìn" (發勁) used by practitioners of the internal martial arts to generate relaxed but explosive force. A key aspect of fa jin is the recruitment of the body's sinews (tendons, ligaments, and other connective tissues) to release force rather than relying on muscular tension.

Jìn (勁), or "power," is often confused by Westerners with the related concept of jīng (精), which literally means "semen," and by extension used metaphorically to mean "essence" within the context of Taoist literature and traditional Chinese medicine.

See also

*Baguazhang
*Dantian
*Silk reeling
*T'ai Chi Ch'uan
*Xingyiquan
*Liuhebafa
*Yuan qi
*Zhan zhuang