What is Qigong (Chi Kung)?
Qigong is the art of developing internal energy particularly for
health and vitality, mind expansion and spiritual cultivation.
Qigong uses body movements, rhythmic breathing, visualizations and healing sounds.

Qigong is a combination of two ideas :

Chi “Qi” (pronounced chee), means air, breath of life, or vital energy that flows through all things in the universe. In other cultures around the world it is Prana, Aether, Life Force Energy, etc.
Kung “Gong” (pronounced gung, as in lung) means the skill of working with, or cultivating, self-discipline, learned skill and achievement.

*Also spelled Qigong, chi gong and chi gung

Pronouncation :
Romanized Chinese “qigong” sounds like [ch’i kung] or chee in the English spelling system, and not like [ki gong]. or key.

The word “Qigong” literally means “breathing exercises,” “to work the vital force,” “energy mastering exercises,” “mastery of the posture, breath and intention” etc.