In order to put together the effects of core training, this study collected the existing preceding researches, and then applied the meta-analysis. For this, after going through the PICO set-up process, this study performed the systematic literary review and meta-analytic approach focusing on total 13 theses. The results of the analysis could be described as follows. First, in the results of analyzing the overall effect size, the Hedges’ g value was .713. Second, in the results of verifying the effect differences between sex, the effect size of men was .798 while the effect size of women was .709. The difference in effect size between two groups was not statistically significant, which verified the effects of core training on both groups of men and women. Third, in the results of verifying the effects according to the matter of disease, in case when there was a specific disease, the effect size was .358. When there was no specific disease, the effect size was .765. The difference in effect size between two groups was statistically significant. Fourth, in the results of verifying the effect differences according to the frequency of participation. in case of three times a week, the effect size was .703. In case of four times a week, the effect size was 1.516. The difference in effect size between two groups was statistically significant. This verified that the effects of core training would be more increasing when the frequency of participation increased. Fifth, in the results of conducting the meta-regression analysis after setting up the participation hours as an independent variable and the effect size as a dependent variable, the increase of participation hours did not have significant effects on the effect size.