تأثير التمرينات التصحيحية باستخدام الأدوات المساعدة على بعض المتغيرات البايو الكينماتيكية و دقة الأرسال القاطع الواطي بالتنس

Abstract EN

The research aimed the following:  To identify the values of some Kinematic variables skill to perform the transmission serve.

 To establish corrective exercises using some tools and means of assistance.

 To identify the effect of corrective exercises using some tools and means to help some of kinematics variables and serving accuracy in tennis.

An experimental method with a design of one group of tests (tribal and post) as the most appropriate methods to achieve the objectives of the research has involved the research community for players young Erbil club sports tennis's (8) players, it was excluded (2) players because they used the left hand, and the exclude (1) player because he has not committed to training units and (1) to another player because he did not participate in the post-test, So now the research community was (4) with a rate of (50%) of the sample.

The researcher has designed an experimental form assistance tools.

The researcher conducted a pre-test of the sample by using three cameras and photography to perform the skill of serving which was to identity and diagnose errors by comparison with the world model.

The researcher developed some corrective exercises by using tools and aids.

(8) Weeks were conducted to finish the exercises by (3) units in a week, where the total units of corrective exercises (24) units within a time of (280) minutes.

After completion of corrective exercises the researcher conducted a post-test under the same circumstances of pre-test.

A certain statistical means were used in this study such as arithmetic mean, standard deviation and ratio percentage, coefficient of variation, coefficient of simple correlation (Pearson), coefficient of self-truth, and t.test of one sample, with using statistical program (spss).

The researcher concluded the following:  It has been reached constructing of (kinematical) model for national level for serving skill in tennis.

 The use of tools and aids (corrective piece, throwing ball by hand, accurate of throwing the ball, suspension stickball) have been achieved its objective.

 The uses of corrective exercises have a positive effect in improving most kinematics variables and accuracy of serving skill.

The use of corrective exercises with tools and means have a positive effect in improving kinetically path of tennis racket head in performance of serving skill