In the Sinosphere and Chinese philosophy, qi is a vital force traditionally believed to be a part of all living entities. Literally meaning 'vapor', 'air', 'gas', or 'breath', the word qi is polysemous, often translated as 'vital energy', 'vital force', 'material energy', or simply 'energy'. Qi is also a concept in traditional Chinese medicine and in Chinese martial arts. The attempt to cultivate and balance qi is called qigong. Believers in qi describe it as a vital force, with one's good health requiring its flow to be unimpeded. Originally prescientific, today it is a pseudoscientific concept, i.e. not corresponding to the concept of energy as used in the physical sciences. Chinese gods and immortals, especially anthropomorphic gods, are sometimes thought to have qi and be a reflection of the microcosm of qi in humans, both having qi that can concentrate in certain body parts.