Qigong (simplified Chinese: 气功; traditional Chinese: 氣功; pinyin: qìgōng; Wade–Giles: ch'i4 kung1) is an increasingly popular aspect of Chinese medicine involving the coordination of different breathing patterns with various physical postures and motions of the body. Qigong is mostly taught for health maintenance purposes, but there are also some who teach it, especially in China, for therapeutic interventions. Various forms of traditional qigong are also widely taught in conjunction with Chinese martial arts, and are especially prevalent in the advanced training of what are known as the nei chia (internal martial arts).
There are currently more than thirty three hundred different styles and schools of qigong. Qigong relies on the traditional Chinese belief that the body has an energy field generated and maintained by the natural respiration of the body, known as Qi. Qi means breath or to breathe in Mandarin Chinese, and by extension the energy produced by breathing that keeps us alive; gong means work or technique. Qigong is then "breath work" or the art of managing the breath to achieve and maintain good health, and especially in the martial arts, to enhance the leverage and stamina of the body in coordination with the physical process of respiration.