Quasi-simplex structure of muscular power tests for soccer players

Abstract

　The purpose of this study was to confirm the quasi-simplex structure of selected control tests for muscular power development programs in soccer. Corresponding to the training phases of power development programs, squat (1RM), standing long jump, standing five-step jump and 30 m dash were selected. Muscular power performance of 66 male college soccer players was measured by tests. Test-retest reliability of the tests was analyzed. The quasi-simplex structure of the tests was analyzed statistically utilizing a correlation matrix and structural equation modeling (SEM). The reliability was .931 for the standing long jump, .948 for the standing five-step jump, and .858 for the 30 m dash. The correlation matrix of the tests indicated a simplex structure. The quasi-simplex structure model of the tests indicated a high goodness-of-fit. The degree of the model fitting indicator GFI was .994, and .972 for AGFI, .000 for RMSEA, .999 for CFI, .991 for NFI, 16.725 for AIC, and .725 (.696) for Chi-square (p-value). Pass coefficients between tests were significant statistically (p<0.05). In conclusion, it was inferred that some of the selected control tests had a quasi-simplex structure for muscular power development programs in soccer.