8Lord, S. R., Ward, J. A., & Williams, P. (1996). Exercise effect on Dynamic stability in older Women: A randomized controlled trial. Archives of Physical Medicine and Rehabilitation,77,232- 236.
9Faigenbaum A. D., Milliken, L. A., Loud, R. L., Burak, B.T., Doherty, C.L., & Westcott W. L. (2002). Comparison of 1 and 2 days per week of staength training in children. Research Quarterly Exercise Sport, 73,416 - 424.
10Shih, J. (1997). Basic Beijing twenty - four forms of Tai Chi exercise and average velocity of sway. Perceptual and Motor Skills, 84,287 - 290.
