LUMBAL AND ABDDOMINAL MUSCLES ISOMETRIC POTENTIAL IN VOLLEYBALL CADETS

The aim of this study was to analyze the possible differences in spinal lumbar and abdominal muscles isometric potential of prospective male and female volleyball players, the cadet selection of Serbia, aged 14 ± 6 months. Sample included 42 subjects with mean height 177, 38 cm (SD ± 6, 36), and mean weight 56, 02 kg (SD ± 7, 28), 15 male and 27 female subjects. Isometric muscle potential assessment was conducted using four standardized motor movement tasks. In addition to the descriptive statistics used, as basis statistics, the t-test for independent samples was used, to compare the mean values of parameters measured in two different groups of athletes – volleyball players (girls – boys). Descriptive indicators of the sample suggest greater values of deep spinal muscles isometric potential with boys in all study variables. Study results gained by the t-test of independent samples indicate that statistically significant difference exists between their mean results in variables of trunk flexor static contractions and trunk extensor static contractions, at the level 0.001. With other two variables, the values indicate that difference between genders is not significant but accidental