농구 숙련자와 비숙련자의 자유투 동작에 대한 운동학적 비교 분석

Abstract

This study was conducted in order to identify the characteristics of the free throw motion through comparative 3D image analysis of kinematic variables related to each body segment during a basketball free throw motion by experts and non-experts, and to provide new information to basket players and basic scientific information to field instructors for their teaching of efficient free throw motions. For these purposes, we sampled 5 basketball experts (players) and 5 non-experts (non-players) from a men`s university, and analyzed the duration of motion, center of gravity displacement, center of gravity velocity, and angular velocity of each joint by phase of free throw motion, and drew conclusions as follows. First, the duration of free throw motion in each phase was shorter in non-experts than in experts, and the overall duration was significantly different between experts and non-experts. Second, center of gravity displacement was not statistically significantly different between experts and nonexperts, but in the comparison of mean values, experts showed smaller displacement on the left-right axis and the front-back axis and larger displacement on the vertical axis than non-experts. Third, COM velocity was not statistically significantly different between experts and non-experts, but in the comparison of mean values, experts showed lower velocity on the left-right axis and the front-back axis and higher velocity on the vertical axis than non-experts, and these differences were statistically significant. Fourth, the angular velocity of the right and left shoulder joint was significantly different between experts and non-experts in the 2ndphase, but the angular velocity of the right one only was significantly different in the 4th phase.