Qi has many meanings: air, gas, smell, spirit, vigor, moral, tone, atmosphere, wind, attitude, breathing amongst others.In the West is usually translated to energy, however it is a much wider concept.
Qi Gong means the art of successfully manipulating Qi.
Over the years the chinese created several sets of movements and simple exercises that enhance the free flow of Qi in the body. These movements when practiced regularly give a general well-being and improve life quality. Also, they can be prescribed as part of a treatment in Traditional Chinese Medicine.