علاقة بعض المتغيرات الكينماتيكية للذراع الضاربة و نسبة مساهمتها بدقة الإرسال المستقيم بالتنس للناشئين

الملخص EN

The importance of research to find out some of the Kinematic variables of striking arm relationship of the striking arm the percentage contribution accuracy for tennis flat serve for juniors.

Through follow-up to the researcher to perform tennis players rookies have noticed the difference in the form of the movement of parts and joints of the beating arm (Extension and flexion of joints) the moment of hitting the ball as well as the variation in scores accuracy, the reason why the researcher study some Kinematic variables of striking arm in an attempt to find out the type of the correlation between these variables and accuracy, as well as the percentage of their contribution to the rectal transmission accuracy.

The research sample included the (5) of Baghdad governorate juniors ages (13-9).

after statistical treatment results were obtained which showed the emergence of a very high correlation between the transmission accuracy and both variable shoulder angle and variable starting the ball angle, and the emergence of a high correlation between the transmission accuracy and attachment angle and the relationship of moderate correlation between the transmission accuracy and the angle of the wrist.

Both the shoulder angle well and won the ball on the launch of a high proportion of the contribution of the transmission angle accuracy, while the proportion of the contribution of each of attachment angle and the angle of the wrist in the transmission accuracy.

Finally, it was one of the most important recommendations emphasize the coaches junior categories at the training variables search for the striking arm being one of the most important determinants of accuracy when performance.