Zhan zhuang
Overview
 
Zhan zhuang is a method of training in many Chinese martial arts
Chinese martial arts
Chinese martial arts, also referred to by the Mandarin Chinese term wushu and popularly as kung fu , are a number of fighting styles that have developed over the centuries in China. These fighting styles are often classified according to common traits, identified as "families" , "sects" or...

 in which static postures are used for physical training, to develop efficiency of movement, perfection of structural alignment; and hence maximal strength, for martial applications.
It is most often practiced among the internal Chinese styles
Neijia
Nèijiā is a term in Chinese martial arts, grouping those styles that practice nèijìng , usually translated as internal martial arts, occupied with spiritual, mental or qi-related aspects, as opposed to an "external" approach focused on physiological aspects...

 such as t'ai chi ch'uan.

Contrary to the most common notion of cardiovascular exercise necessitating vigorous movement, it is said that zhan zhuang confers significant physical conditioning.
 
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