engleski

Kinematic analisys of the basketball jump shoot with a backward take-off

PURPOSE: The aim of this research was to explore basic kinematic performance technique indicators of the basketball jump shoot with a backward take-off, as well as possible applicability of the results in everyday basketball practice. METHODS: The acquisition of data was carried out on the training of high quality basketball players, members of the first national league. The video footage was taken at a training session of quality A1 league basketball players. Recording was done by two video cameras. After reviewing the recorded material, one jump shot with a reflection in the back was selected, which can be characterized as a model performance of this motor moving structure.The recording was performed by two video cameras. After viewing the 30 jump shoots with a backward take-off, performed by two players, one of them, which could be considered as a typical model, was subjected to further analysis. 3D data processing was made with APAS (Ariel Performance Analysis System). For the purposes of this research, the analyzed movement is divided into 3 phases: preparatory phase, basic phase and final phase. In these three phases, 17 variables have been observed. RESULTS: In preparatory phase right foot was 27, 6 in front of left and space between was 49 cm. Before shooting the ball legs are bended at the knees so that the player can jump more efficiently.In that lower position player have better stability and balance. In the case of this research right knee was flexed to 115° and left knee to 102°. Because of knee flexing center of gravity (CG) is lowered 10 cm. In the same time trunk is bended 7° forward. Initial high of the ball is 90 cm above the surface and elbows angles are 88° in the left and 72° in the right elbow. In basic phase with a powerful pushing action with both legs player starts the take-off. That pushes last 0, 183 sec until full extension in knee joints and 0, 366 sec until release of the ball. Jump backward was 31 cm long (transfer of CG). During the jump player lifts his elbow until reaching 116° between upper arm and trunk. After that player lifts the ball with extension in elbow joint. In the moment of shooting the ball the angle in elbow is 164° (a common opinion is that elbow must be maximally extended). In this study the player released the ball right after reaching maximum height of jump (158 cm height of CG) so theory about releasing the ball in maximum height of the jump is confirmed. CONCLUSION: The results obtained with this analysis can find its application in practice, in terms of more objective and accurate observation and correction of errors in jump shoots with a backward take-off performance.

biomechanics, kinematics, basketball, jump shoot

nije evidentirano