Special exercises in the use of unspecified places to for advancement and their effect on improvement of achievement and some biochemical variables in the long jump among students

تمرينات خاصة باستعمال اماكن غير محددة للنهوض واثرها على تحسين الإنجاز وبعض المتغيرات البايوكينماتيكية بفعالية الوثب الطويل للطلاب

الملخص

 long jump includes the various technical stages that the jumper achieves to a good level of achievement if performed well and quickly. This allows the parts of movement to be defined clearly and accurately. This is achieved by performing repetitions, corrections and relying on feedback to ensure understanding and control of the movement, and the issue of identifying and controlling the critical points affecting performance requires the use of imaging and analysis in order to identify the real problems affecting the technical performance and not just rely on mere viewing, because the performance moment of advancement is characterized by speed and interrelation among the technical stages. Here,  the research significance is expressed through the use of unspecified places for the advancement plate to help improve achievement and the starting parameters (starting speed, starting angle, height of the center of gravity) in the long jump to reach the level that the researcher aimed to achieve.