تأثير تمرينات خاصه على وفق بعض المتغيرات البايوميكانيكيه لتطوير إنجاز ركض 400 م حواجز للناشئين

Abstract

The development of technical performance level for players of 400 m barriers running came through selecting modern teaching devices which assist in learning process of this skill . Therefore, the researcher decided to use the technical devices for learning and monitoring the performance and obtaining information and later using such information to correct the performance in all stages of activity . The activity of 400 m barriers running is regarded as one of the activities which has been witnessing recorded due to the use of the suitable and special exercises commensurate with the activity of 400 m barriers running .
The research significance lies in revealing some biomechanical variables affecting in the nature of the performance of the activity of 400m barriers running to prepare special exercises ,according to some biomechanical indicators, effective training methods for coaches in order to develop the achievement of young players .
The research problem lies in the physical level of runner and their abilities to play an important and basic role in performing 400m barriers running which distinguish among runner as well as a number of biomechanical variables which happen at the effective moment of to move up and cross the barrier and the consequences which negatively affect the motor track for the skill which started at the moment of arise passing through the moment of crossing the barrier and ending at the moment of landing after the barrier and the consequences such as the technical performance and precise control of body parts at these moments. The research objective was to identify the values of the biomechanical variables as well as the number of specific exercises according to the biomechanical indicators of the research sample.
The research sample consisted of 6 junior players . The researcher has concluded the flowing:
1.The special exercises in accordance with the biomechanical variables have effectiveness in developing achievement of 400m barrier race by juniors
2.The aiding devices and tools which were in accordance with performance and used within the prepared special exercises had positive effect in developing some biomechanical variables .