Basic Beijing twenty-four forms of T'ai Chi exercise and average velocity of sway.

To examine the effect of 16 weeks of T'ai Chi exercise on the average velocity of sway 11 subjects were pre- and posttested by using the AMTI force platform. Analysis indicated that T'ai Chi exercise was associated with substantial changes in the sway velocities in anterior and posterior directions for the group but was not assessed against any control groups performance. That remains to be evaluated.