Unbalanced strength training using auxiliary tools and their effect on some biomechanical variables in the starting and departure stage among 110 m hurdles advanced players

تدريبات القوة اللامتزنة باستخدام ادوات مساعدة وتأثيرها في بعض المتغيرات البايوميكانيكية في مرحلة البدء والانطلاق للاعبي ركض 110م حواجز للمتقدمين

الملخص

Strength is the basis in the performance and training of speed and elongation, and it is the key to progress for all sporting activities not only in the sports field but also in public life. Therefore, its training methods and unbalanced strength differed depending on the means and tools to achieve these exercises, since the level of the player depends on his muscle strength with a variation in the extent of its need for the muscle strength component, and one of the activities that needs accurate knowledge of indicators and mechanical variables is speed activities, especially the hurdles running , since they are the most important and  prominent speed activities. So , it was necessary to know the precise details of this activity, especially in the stage of need and starting from the momentary strength of both the front leg and the back leg and the time of pushing for each leg as well as the knee angle of the moment of push as well as the momentum of each of the first step and the second step after the start as most of the Arab and international achievements are determined in the start and then departure  stage where they affect the level of achievement .The correct start also affects the subsequent stages in this event. Since the starting stage consists of several stages, therefore each stage has its mechanical indicators and its temporal characteristics related to the correct performance, how to perform these stages and the correct interconnection to perform each stage with the next stage with the least possible time and the correct starting with the correct linkage of the first steps after departure also with the least possible time, Therefore, it is necessary to know the effect of unbalanced strength training using auxiliary tools in some biomechanical variables in the start and departure stage  among  110 m hurdles advanced players .The starting and starting test was done with the presence of video imaging and the test was done pre and post  conditions under the same conditions and the application of research exercises for a period of (32) training units. The researchers concluded that reducing the time of pushing and improving the knee angle for each foot affects the momentary strength of each foot, and thus the momentary strength and time of propulsion for the first and second step.