Özet:

Aim: The study aims to conduct a kinematical analysis of blocking skill in volleyball and their relationships with the explosive force of lower limbs, for the athletes from the elite Algerian team. Methods: A total of 06 male Volleyball Players from the elite Algerian team as volunteers (Age: 25.66+3.32 yr, Length:198.00+3.68 cm, Weight: 86.66+6.62 kg). We used for kinematical analysis the software Dartfish9. For video capturing, we used three cameras (AEE Magic Cam) for record the performance during an Experimental competition, two CAMІ&П(X1m, Y, Z1.5m) were placed in the sides of volleyball Court, and CAMⅢ(X4.5m, Y1m, Z1.5m) behind the elite Algerian team. Also, two force Explosive tests were executed Squat Jump (SJ) and Counter Movement Jump (CMJ). The data were analyzed in SPSS 22.0 program. Descriptive statistics (mean±SD) and P test for the correlations between variables studied. Results: Through the statistical analysis, there were significant correlations between values of CMJ test with both of the DHeightBCG (p<0.01), & DMax height (p<0.01), and between variable DMax height with each of the °Trunk (p<0.01), & °Knee (p<0.01), and DLowBCG (p<0.01), and DHeightBCG (p<0.01) respectively, at the 0.05 level. Also, between DLowBCG with °Trunk (p<0.01), and with °Knee (p<0.01). Conclusion: This study was able to produce results that are helpful to coaches when deciding when they are considering vertical jump heights during the performance of blocking skill in volleyball, through developing the technical aspect of the blocking skill by training players to improve the kinematical properties of a certain degree especially, the angles of the lower limbs of the body, such as the angles of the trunk, knee, and ankle. 

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