T'ai Chi Ch'uan or Taijiquan (literally "supreme ultimate fist"), commonly known as Tai Chi, is an "internal" Chinese martial art which is known for the claims of health and longevity benefits made in recent medical studies.

Tai Chi is a "soft" style martial art, applied with as complete a relaxation or softness in the muscles as possible, distinguishing its theory and application from that of the "hard" styles which use a degree of tension in the muscles.

The core training involves two primary features: the first being the solo form, a slow sequence of movements which emphasises a straight spine, relaxed breathing and a natural range of motion; the second being different styles of pushing hands or tui shou, for training sensitivity in the reflexes in order to learn leverage, timing, coordination and positioning when interacting with another.