Analysis of some biochemical variables of the step of crossing hurdle in 110 m hurdling event for one of the country's youth champions

تحليل بعض المتغيرات البايوكنيماتيكية لخطوة اجتياز الحاجز لفعالية عدو 110م حواجز لاحد ابطال شباب القطر

Abstract

Most coaches depend on identifying the mistakes of their players on simple self-observation and their decision depends on their self-evaluation, which is tainted by something of deficiency due to the speed of movement and the multiplicity of its stages and variables, and based on the progress made in the means of technical scientific observation and dependence on objective judgment (evaluation) ,researchers found the need to use it in evaluating   the technical performance level  of 110 meters hurdles. The research aims to identify the values ​​of some biomechanical variables for the stages of crossing hurdle in  110 meters hurdling, and identify the mistakes of the technical performance of the stages of crossing hurdle in 110 meter hurdling. The descriptive method was used  for its suitabilityfor  nature of the  research. The research sample consisted of the player (Mohamed Essam Dara Faddem), who is a member of the Kirkuk governorate team and the Iraqi national team  of 110 meters hurdling. The researchers used technical scientific observation and computer-based biochemical analysis and testing as means of collecting data. To achieve the technical scientific observation, video imaging was used by a camera set at a distance of (7 m) and the height of the lens (1 m) from the floor on  the right, and it depicted the stage of crossing the first hurdle. The researchers used Iflima program, Premear program, AUTO CAD 2017 program and Excel program. The researchers relied on a number of biochemical variables according to their importance in this event, namely (displacement from rising to barrier / displacement from barrier to landing / total displacement of the step of crossing the barrier / horizontal speed of advancement / The vertical speed of the rise / The height of the body’s center of gravity during the moment of abandonment / The height of the body’s center of gravity at the time of descent / The highest point of the body’s center of gravity during flight / The horizontal dimension of the highest point of the body’s center of gravity during flight from the barrier. The researchers concluded that the research sample achieved the good  values for  some of the biomechanical variables under study represented in (displacement from rising  to the hurdle). The research sample did not achieve the good values ​​for the rest of the biomechanical variables under study. The researchers recommended to emphasize the use of modern scientific techniques to present and explain skill errors, and stress on  sports education in the nature and importance of biomechanical variables for each stage of the hurdling .