There are many studies showing that Tai Chi Chuan is an effective aerobic exercise, but there is also research suggesting that evidence is inconclusive. Examples of two such studies are listed in the "References" area below. The problem with much of the research is the fact that the type or intensity of Tai Chi is often not clearly defined. Tai Chi Chuan may be done slowly, to the extent that the practitioner works no harder than a slow walk. However, the same exercises can be done with lower, wider stances and greater stretching, or a longer more challenging form could be used, thus elevating heart rate to the aerobic range.
Read more ...