دراسة مقارنة لقيم بعض المتغيرات البايوكينماتيكيه لمرحلة اجتياز الحاجزين التاسع و العاشر في فعالية عدو 110 م حواجز

The problem of this research is the difficulty of the 110m hurdle race which depends on the athlete's speed and performance, for it requires great acceleration in order to pass the hurdles and reach the final line. A mechanical relation between bio-kinematic variables is necessary for the athlete to pass the hurdles smoothly. The purpose of this research is identifying the values of certain bio-kinematic variables related to the ninth and tenth hurdle. The research sample consists of one of Iraq's champions in athletics. After performing the statistical processes, the researchers noticed a contrast in the values of the tested variables during the passage of the ninth and tenth hurdle. The athlete's speed and his launch angle before the hurdle affect the launching curve formed by the body gravity centre. The researchers' recommendation is reassuring the development of lengthening the athlete's speed during the hurdle race, for it affects the values of the tested variables greatly.