Tai Ji Quan, known also as T‘ai-Chi, is a real life internal Chinese martial art 武术 practiced for both its defense training and its health benefits. Though originally conceived as a martial art, it is also typically practiced for a variety of other personal reasons: competitive wrestling in the format of pushing hands (tui shou), demonstration competitions, and achieving greater longevity. As a result, a multitude of training forms exist, both traditional and modern, which correspond to those aims with differing emphasis. Some training forms of t‘ai-hi ch‘üan are especially known for being practiced with relatively slow movements.
The core training involves two primary features: the first being taolu (solo "forms"), a slow sequence of movements which emphasize a straight spine, abdominal breathing and a natural range of motion; the second being different styles of tuishou ("pushing hands") for training movement principles of the form with a partner and in a more practical manner.
The taolu (solo "forms") should take the students through a complete, natural range of motion over their centre of gravity. Accurate, repeated practice of the solo routine is said to retrain posture, encourage circulation throughout the students' bodies, maintain flexibility through their joints, and further familiarize students with the martial application sequences implied by the various forms. The major traditional styles of t‘ai-chi have forms that differ somewhat in terms of aesthetics, but there are also many obvious similarities that point to their common origin. The solo forms—empty-hand and weapon—are catalogues of movements that are practised individually in pushing hands and martial application scenarios to prepare students for self-defence training. In most traditional schools, different variations of the solo forms can be practised: fast / slow, small-circle / large-circle, square / round (which are different expressions of leverage through the joints), low-sitting / high-sitting (the degree to which weight-bearing knees are kept bent throughout the form), for example.
Breathing exercises; neigong (internal skill) or, more commonly, qigong (life energy cultivation) are practiced to develop qi (life energy) in coordination with physical movement and zhan zhuang (standing like a post) or combinations of the two. These were formerly taught only to disciples as a separate, complementary training system. In the last 60 years they have become better known to the general public.