A comparative study of some biomechanical variables of the first and second barrier step Effectively 110 m hurdles

الملخص

Research objective: The research aims to identify

 1-Find the differences between some of the kinematic variables of the first and second barrier step (before, above and after) the barrier for the effectiveness of   110m hurdles.

      The two researchers used the descriptive approach to suit the nature of the research. The research sample was deliberately chosen from the second stage students in the College of Physical Education and Sports Science / University of Mosul for the academic year2019-2020  they number ( 6 ) , as they represent the best students who perform an enemy of  110 m hurdles and the best achievement,  the two images were used (sony type) Japanese-made and they as they were at  with a speed of ( 25 ) images / second,  its lens ( 1 )m height and after ( 6.80 ) m from the first and second barriers respectively, filming from the right side of the runner and the movie used was acidified ( 8 )mm and converted to a CD to facilitate the process of motor analysis .the researchers measured the lengths and weights of the individuals the research sample using the measuring tape to measure the length and the electronic balance to measure the weight For the purpose of achieving parity among the members of the research sample, the sample was tested with a given each runner two attempts ( 110 ) m hurdles , and the best analysis was technical and accomplished  for the boimekanic  variables at the first barrier and the same  variables at the second barrier selected, the programs used in data analysis max track program - ACD see 2010 Photo Manager program- paint program : the spss statistical 0.11 program, and the following statistical methods were used: the arithmetic mean . -standard deviation. Coefficient of variation%. - t test for the associated samples to produce the search results

The researchers concluded:

  1- How important is the proximity and after the pivot feet before crossing the barrier to pave the way to control the kinematic variables above and after the barrier, especially the first and second barriers effectively (110 )m barriers and achieve the best achievement

  2-The height of the body's meth. The body’s level above the surface above the barrier as a kinematic variable has the effective role in performing and improving the barrier step technique.