THE RELATIONSHIP BETWEEN SOME BIO KINEMATIC VARIABLES AND STRENGTH FUNCTION-TIME OF JUMP SERVE IN VOLLEYBALL

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Cevdet Tinazci*, Sura Jamil Hanna, Hakar Barqi Zibari

The study aims at identifying the relationship between some bio-kinematic variable and strength function-time of jump serve in volleyball. The research sample was selected and 10 male right-handed volleyball players of Erbil club who had average to excellent level of jump serve participated in the study. The average mean and standard deviation of the players for height, weight and age were found to be 188.1cm ± 6.48 cm,78kg ± 9.29 kg and 24± 4.86(years), respectively. Kinematic and kinetic were measured for collision, absorption, pushing. Both anticipatory and directional effects were seen for many of the variables including angle of right knee, angle of right shoulder, angle of right hip, time, and height of C.G. The kinematic data were recorded by using Sony camera and analyzed by skill Spector V 1.3. This study utilizes quantitative approach in finding the relation between some kinematic variables and strength function-time of jump serve in volleyball. Also, the research uses descriptive statistics such as mean and Standard deviations to determine the responsiveness of the variables to a change in either a situation or strategy. In statistics, correlation r measures the force and direction of a linear relationship between two variables and SPSS version 20 was used for this. The current study revealed that only # variables include relation between kinematic variables for jump serve with minimum force variable on the platform of volleyball players, this includes significant difference r=-0.69, p≤0.02 for angle of right hip at the moment of push with less force on platform, r=-0.65, p≤0.03 for angle of tendency with a vertical line, r= 0.64, between the angle of right of knee in the collision stage with foul touch time on platform, r= -0.64, p≤0.04for. Thus, the remaining variables show insignificant relation thereby rejecting the hypothesis.