Tai Chi is a Chinese Taoist martial art form of meditation in movement, combining mental concentration, coordinated breathing, and a series of slow, graceful body movements. Tai Chi may be practiced for meditative and health purposes or, with increase speed, the movements may be used for self defense. The practitioner allows the body weight or center of gravity to sink into the abdomen and feet. This relaxes and deepens the breathing, quiets the mind, and, in turn, regulates the heartbeat, digestion, and various other muscular, neurological, glandular, and organic functions.