Basketball free throw biomechanics: movement variability's impact on throwing accuracy and dynamic stability of the upper limb
| Date |
|---|
2018-11-29 |
eISBN 978-9955-15-587-4
Abstracts included in the „Book of Abstracts“ were reviewed by one independent scientific referee. Referees: Algė Daunoravičienė, Alma Kajėnienė, Vilma Mauricienė, Laimonas Šiupšinskas, Ernesta Gurskienė, Viktorija Kaktienė, Agnė Slapšinskaitė, Brigita Zachovajevienė, Renata Žumbakytė-Šermukšnienė.
Bibliogr.: p. 30
Introduction. The ability to shoot an effective free throw in basketball is critical to any player’s success (1). The study of movement variability is relevant for analyzing athlete’s biomechanical qualities. (2). Skilled players are considered to exhibit less variability (3) and that it needs to be minimized for optimal performance (2). However, from the dynamical systems perspective, variability is necessary for the movement system to adapt (4), and therefore dynamic stability and variability are related. Research aim: to determine basketball free throw movement variability's impact on accuracy and dynamic stability of the upper limb. Research methods and organization. In this study there were 11 professional division B basketball players. The mean age of the participants was 26,18±3,73; the average height 196,18±9,15 cm; the average weight 94,27±14,39 kg. Every participant was asked to perform 20 free throws in a row. The participants had time to warm-up and to do as many shots as needed before the evaluations. None of the test subjects had upper limb pain or injury in a week prior to the testing. Each free-throw was filmed using two cameras, both in the frontal and the sagittal planes. Special markers were placed on greater tubercle of humerus, head of radius, olecranon process of elbow, middle part and triquetral bone of wrist, distal part of V metacarpal bone, greater trochanter tuberosity of femur. Angles and positions of the upper limb were measured using motion analysis program “Kinovea” as follows: -In the frontal plane – angle of the humerus and angle of the forearm to vertical axis in cocking and release phases; -In the sagittal plane – angle of shoulder, elbow, wrist flexion or extension in cocking and release phases. To measure variability of every set of upper limb position parameters, coefficient of variation was calculated as the ratio of the standard deviation to the mean. Accu[...].