تأثير تمرينات القوة بالأطالة اللامركزية (P.N.F) في بعض عناصر اللياقة البدنية والمتغيرات البايوميكانيكية لمهارة التصويب من القفز للاعبي كرة اليد الشباب

Lmpact of strength Trainings Propioceptor Neuromuscular by the Decentralized Prolongation (P.N.F) in some physique fitness and Biomechanic varible of sharpshooting skill by jumping to young hand ball players

Abstract
Using Modern and different styles and ways in training process work to achieve the highest level and to reach the perfect performance, one of these styles is using style of decentralized proprioceptive neuromuscular fitness (PNF) by the constriction and relaxation way to get benefit from developing some elements of physiques fitness and bio mechanic variables and the reflexive actions produced from prolongation and happenings of the reflexive actions.Hence. the research significance came by using a training style to improve some elements of physiques fitness and bio mechanic variables by using styles is using style of decentralized proprioceptive neuromuscular fitness (PNF) which positively reflects on level of performance of sharpshooting by jumping and reaching to the highest level through which the aim of the study is carried out.The research aims at preparing proprioceptive neuromuscular fitness to improve some bodily and mechanical variables that have clear impact in sharpshooting by jumping to young groups (the experimental and the controlled) in some physiques fitness elements and mechanical variables to sharpshooting skill by jumping to young handball players.The researcher adopted. the experimental approach by the equivalent groups of the anterior and posterior measurements who consider it agreeable to the research attributes and to achieve the aims of the study.The researcher concluded that trainings of proprioceptive neuromuscular fitness have positive influence in developing some physiques fitness and bio mechanical variables that have clear impact in sharpshooting by jumping to young volleyball players. Also, theamount of progress of these prolongation trainings (PNF) was bigger in the experimental.
than the controlled group. The research community composed of young handball players ranged from 17 to 19 years affiliated to Al Nasr, Al Nasiriyah, and Al Shatrah sport clubs participated in first league 2021- 2022 who were about 35 players.
The researcher randomly chose the sample who were players of Al Nasr sport club about 16 players after excluding the two goalkeepers, so the number became 14 players. Those represented 40% who were randomly divided into two equivalent groups( the experimental and the controlled), each group has 7 players.