دراسة مقارنة المشهد البصري و قيم بعض المتغيرات البيوكينماتيكية بين التصويب من القفز بعد الاقتراب بالحركة الخطية و الدوراتية و المحتسب بنقطتين بكرة السلة

الملخص EN

Basketball is considered as one of the plays that are characterized with excitement and competition and which players show their skillfulness through movement performance with high innovative and aesthetic features.

Information must reach the brain through the visual scene which leads to choose the movement program that suits the instant play circumstance and the players closeness to the basketball and his tallness.

The importance of this paper lies in the availability of the scientific information and the objective facts about the importance of the visual scene and its relation to the movement performance to shoot in jumping position after approximating with linear and circular movements.

As for the problem of the paper , it is about the rareness of information about the interval that precedes the shooting movement associated with variables specially when shooting comes after balance process through linear and circular movements which influence shooting performance .

The researchers aim is to find out the differences of the visual scene time and the values of some biokenamatics variables between shooting from jump position with linear and circular movements having two scores in basketball.

The descriptive procedure with survey has adopted as they best suit such studies to get at accurate conclusions .

Four players from the national team of basketball were chosen.

The reconnaissance experience was first held in 18.3.2011 then the field experiment in 30.3.2011 in the closed gallery of ALNassriya club .

The shooting area was limited (5.75m) from the imaginative point in the center of the basket which is (1.5m) far from the side line of the prohibited area of the right side of the basket.

The camera was fixed on the right side of the player shooting from (6m) with (1.70m) high.

Part of the research variables are the visual scene time, knee corner with maximum curving, and the maximum height of the load center of the players body during the shooting moment.

It is indicated that the visual scene time during shooting with jumping approximating the linear movement is less that the one in circular movement.

The researcher attributes these differences to the face that the player when sho6oting with linear movement is opposite to the basket, and then the possibility of having a glance to the rivals basket to limit the site from which he shooting or receiving the ball to see the basket as his movement is toward the basket and consequently is more capable of limited the shooting site.

The flying corner of the ball while shot with linear movement is greater than the one with the circular movement because the hight of the player shooting from circulation is less this means there is a difference in start and end levels the case that lessens the flying corner to get shorter time for the ball to reach the basket when shooting as the less the start lever is the greater the flying corner will be.

One of the important conclusions is that the visual scene time when shooting while jumping with circular movement was greater than the one of shooting with jumping from the linear movement.

Also knee joint center in maximum curving in shooting while jumping with circular movement was less than the one with linear movement.

One of the recommendations is to emphasize the use of exercises of players performance of shooting while jumping with being able to see the basket with shorter time and to provide more training of shooting while jumping from circulation.