|（1.School of Physical Education，Hefei Normal University，Hefei 230601，China；2.Department of Physical Education，Jining University，Jining 273155，China；3.School of Physical Education，Soochow University，Suzhou 215021，China)
Abstract: In order to probe into the effects of Taijiquan and square dance exercises on the statistic balance functions of middle-age and old women as well as the two exercises’ pros and cons in improving balance function, the authors selected 90 middle-aged and old women whose right foot is the dominant foot, as their research subjects, including 30 women in the Taijiquan group, 30 women in the square dance group, and 30 women in the control group. The authors used a balance tester to test the values of various balance indexes respective under both feet standing with eyes closed, left foot standing with eyes closed and right foot standing with eyes closed conditions, single foot and both feet standing test times were 10s. The authors revealed the following findings: various balance index values of the Taijiquan group and the square dance group were very significantly smaller than those of the control group (P<0.01); most balance index values of the Taijiquan group were significantly smaller than those of the square dance group (P<0.05); some index values of various groups under the single right foot standing condition were sig-nificantly smaller than those under the single left foot standing condition (P<0.05), just that various groups had a different number of differential balance indexes. The said findings indicate the followings: Both Taijiquan and square dance exercises can improve the static balance functions of middle-aged and old women, and the effect of Taijiquan is better that that of square dance; the single foot static balance function of the right foot of middle-aged and old women is better than that of the left foot, and Taijiquan is slightly better than square dance in terms of eliminating the difference between single left foot and right foot static balance functions.
Key words: sports biomechanics；static balance；Taijiquan；square dance；middle-aged and old women