Specialists use many methods to achieve their aimes .These methods help to detect and correct errors ,in addition to identifying and addressing the weaknesses ,or to add more effective tools and aids in order to develop the performance . The kinetic analysis methods adopted by the biomechanics are considered one of the best and most effective methods which help detecting the errors associated with the performance through evaluating the variables representing the performance specifications. This study focuses on the determining the values of the pelvis speed , and stretched bow speed as variables and the speed of Javelin launching and studying the relation between them. This study applied on five Syrian Javelin throwers from the national team who participated in Arab and Asian championships. The study concluded that there was a significant correlation between the speed of pelvis and the launching speed , and there was no significant correlation between the speed of stretched bow and the launching speed neither between the speed of pelvis and the speed of stretched bow. In additionto the low level of the javelin speed lower than world champion's level .There is a weakness in the using of the kinetic transport and in taking advantage from the forces resulting from approach .