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Journal of Advances in Sports and Physical Education (JASPE)
Volume-4 | Issue-03 | 19-23
Original Research Article
Differences in Kinematic Characteristics Between 2-point and 3-point Basketball Shooting Motions – A Case Study
Dimitrije Cabarkapa, Andrew C. Fry, Michael A. Deane
Published : March 8, 2021
DOI : 10.36348/jaspe.2021.v04i03.001
Abstract
Basketball has become one of the most popular international sports in which a successful game outcome is highly contingent upon optimal shooting performance. The purpose of this case study was to quantify and examine the kinematic changes in shooting motion as a player progresses from mid-range 2-point shots to beyond the 3-point line. One former collegiate basketball player performed 50 mid-range 2-point (5.20m) and 50 3-point (6.75m) shots divided into 10 sets separated by 1-2-minute rest intervals. Two high-definition cameras recording at 30 fps positioned perpendicular to the subject’s sagittal plane of motion were used for data collection. The first camera positioned 10 m away was used to capture body kinematics, while the second camera positioned 15 m away was used to capture the trajectory data. The kinematic variables captured at the initial phase of the shooting motion (Phase1) were knee angle, hip angle, ankle angle, elbow height, shoulder angle, elbow angle, and basketball height and at the time point of ball release (Phase 2) were shoulder angle at release, heel height, basketball release height, trajectory height, and ball entry angle. The findings of this case study indicate that greater flexion in the knee joint during the Phase 1 and greater heel height indicating larger vertical displacement during the Phase 2 of the shooting motion were the main kinematic adjustments influenced by the increased shooting distance. Therefore, we may assume that these changes were made to achieve greater ground reaction forces to compensate for the increased distance from the rim.
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