Qi

In traditional Chinese culture, Qi (Ch'i) is an active principle forming part of any living thing.

It is frequently translated as "energy flow," and is often compared to Western notions of energeia or élan vital (vitalism) as well as the yogic notion of prana. The literal translation is "air," "breath," or "gas" (compare the original meaning of Latin spiritus "breathing"; or the Common Greek πνεῦμα, meaning "air," "breath," or "spirit"; and the Sanskrit term prana, "breath").

Source: Wikipedia.         

  

Qigong

Qigong (or ch'i kung) is an internal Chinese meditative practice that often uses slow graceful movements and controlled breathing techniques to promote the circulation of qi within the human body, and enhance a practitioner's overall health. (Source: Wikipedia)

We live in a field of qi, "vital breath" or "life energy." Yet, like a fish in water or a bird in flight, we are unaware of the medium that supports us. Qigong means "working with the qi." It is the ancient Chinese art and science of becoming aware of this life energy and learning how to control its flow through a precise choreography of posture, movement, respiratory technique, and meditation. Like biofeedback, qigong teaches psychophysiological self-regulation; the student becomes aware of bodily functions conventionally considered involuntary-- blood pressure, respiratory rate, even the flow of blood and nutrients to internal organs-- and learns to restore a healthier balance. However, unlike biofeedback, no technical devices are needed. Qigong is one of the most cost-effective self-healing methods in the world. 

Qigong is like a great river fed by four major tributaries: shamanism, spirituality, medicine, and martial arts... (Source: Qigong Research and Practice Center.) 

Complete article : http://www.qigonghealing.com/qigong/qigong.html