After treatment , the differences in the weight shift track parameters , SI and WDI were significant as compared with those before treatment in the patients of the two groups ( all P < @ ) ; while the differences in the weight shift distance parameters in the observation group were improved obviously after treatment as compared with those before treatment ( all P < @ ) , the differences of Mean-X , Max-Y and LFS in the control group were improved after treatment as compared with those before treatment ( all P < @ ) .