Taijiquan is a component part of the Chinese tradition of improving ones health and physique. In the mid-17th century, various forms and styles of shadow boxing emerged, and today there are Chen, Yang, two forms of Wu, and Sun, styles of shadow boxing. Taijiquans unique practice forms combine moving with stillness, firmness with softness, and form with spirit. The movements are soft, natural and continuous, requiring a relaxed and concentrated mind.