We have seen a significant increase in the height of the spike jump at the final test compared to the intermediate testing (p<0.0001) respectively the initial testing (p<0.0001).The counter movement jump recorded a significant decrease in the intermediate test 37.58 cm, compared to the initial test 40.57 cm (p=0.014). The results have shown a significant increase of the average skeletal muscle mass in the final test by 0.77 kg over the intermediate test (p=0.012) and 0.81kg over the initial test (p=0.039).We recorded a considerable increase of body fat mass between initial and intermediate testing (p=0.0073) and there was an average decrease of 1.76 kg (p=0.0285) of body fat mass between intermediate and final testing.
There were no differences in muscle mass between the initial and the intermediate testing (p=0.88). Study results highlighted a significant increase of 1.15kg (p=0.028) in weight at the intermediate testing compared to the initial values. The subjects were tested for body composition and their spike jump and counter movement jump was measured on three separate occasions, each corresponding to a different stage of training. Twelve players (n=12) were selected from the second league Romanian male volleyball team CSU UVT. Our intention was to verify if the body composition indicators change significantly at different stages of a competition season and if the characteristics of the jump, crucial in performing the actions through which the points arescored, are relevant in determining the level of physical conditioning.
The aim of the paper was to identify the values of some parameters that we considered crucial in limiting or maximizing the in-game performance of the athletes in the study. Under these circumstances it is desirable that players of a very large stature also possess a corresponding vertical jump. Volleyball has become a sport of the giants. In conclusion the combination of drop height and weight is a major determinant of jumping ability Also in some situations seem to affect the average momentum, the touch time and the average work produced. Our results showed a statistically significant difference between selected variables and more specifically the placement of excess weight significantly affect the maximum force applied by the Subjects in all kinds of jumps performed whatever the drop height, and specifically in SJ, DJ40 and DJ120.
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The dynamic analysis of the data was made using the software APAS XP and the statistical analysis was performed using the statistical method of repeated measures ANOVA and Tukey Post-Hoc test. The Subject performed vertical jumps Drop Jump (DJ), Squat Jump (SJ) and Counter Movement Jump (CMJ) from different height, initially only with body weight and then using additional weight. For the recording of data used, a) a force plate with piezoelectric crystals, type Kistler 9281 C, and b) construction of a ramp. The subject was 10 students of Physical education and sport sciences department, age 21☐,8 years old, weight 79☒,4 kg and height 1.78± 0,12cm. The purpose of the present study was the evaluation of jump ability on a specially constructed force sledge machine, compared to different fall height and use of additional weight. Systematic monitoring of morpho-functional changes in young female volleyball players over extended periods provides them a chance to maintain their optimal fitness level. A significant reduction in fat content was also noted at this point. The most pronounced changes occurred after the preparatory period and concerned increases in fat-free mass, total water content and cell mass. These changes differ in subsequent periods of the macrocycle. The study showed significant changes in body composition and motor fitness level during the annual training cycle. Measurements were carried out at the beginning of the preparatory period, after its completion, in the middle of the start period, at the end of the start period and during transition periods. Motor fitness was assessed with the following tests: vertical jumping tests (based on one-handed and two-handed reach, standing vertical jump and running vertical jump), standing long jump and 2 kg medicine ball throw. Body composition was estimated by bioelectrical impedance analysis. The research group was comprised of 36 female athletes aged 14-16 years, who were monitored throughout a whole season using a longitudinal study design. The aim of this study was to determine changes in body build, body composition and motor skills in young volleyball female players during an annual training cycle.
Modern volleyball requires a high level of motor preparation, specific body build and optimal body composition.
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