THE METHODICS OF CONTROLLING THE ACCURACY OF FREE THROWS IN BASKETBALL
The methodics of controlling the accuracy of free throws in basketball. Familnikova N.V., Rozhentsov V.V. The sensor which fixes the hit of the ball on the basket ring or shield is set on a standard basketball basket close to the shield. The sensor which fixes the exact hit of the ball without touching the ring is fixed on the net of the basket. The video camera is set above the ring at a given height, the image from the camera is passed to the computer. A basketball player performs a free throw. According to the signal from the sensors, the computer records the projection in a horizontal plane passing through the ring, the position of the ball projection relative to the ring and displays it on the monitor. Then the computer determines the position of the centre of the ball projection in this plane, calculates the distance from the center of the projection of the ball to the center of the ring in two mutually perpendicular coordinates being located in the plane of the ring parallel to the basketball pitch and passing through the center of the ring, the results of calculations are recorded in the archive. A basketball player analyzing the position of the projection of the ball relative to the ring adjusts, if necessary, his / her actions and performs another free throw. Upon the end of the training the computer calculates the arithmetic mean value of the distances from the center of the projection of the ball to the center of the ring at the specified coordinates, its value is taken for the accuracy of free throws.