Chi Gong (also Qigong) refers to the ancient Chinese health care system that combines physical training (such as isometrics, isotonics, and aerobic conditioning) with Eastern philosophy and relaxation techniques.
There are many different kinds of Qigong, including medical Qigong. Some forms are practiced while standing, sitting, or lying down; others involve structured movements or massage. Qigong has been used for centuries in China for the treatment of a variety of medical conditions. Qi gong incorporates movement, breathing and meditation to improve the flow of qi (life energy) around the body, said to increase vitality and promote the body's own healing mechanisms particularly if you have a chronic medical condition or are over 40 years old.
The ancient Chinese are said to have studied the natural movement of animals, after which many qi gong poses take their names.