Abstract
The purpose of this study was to analyze the kinematic characteristics of javelin to compare the characteristics between world elite athletes and local male athletes. The subjects selected 9 athletes out of total 13 athletes recorded more than 65 m in the preliminary and main competition participated in the 93rd National Sports Festival held in 2012. Three-Dimensional motion analysis using a system of 4 video cameras(Sony HXR-MC2000) at a sampling frequency of 60 fields/s was performed for this study. The Kwon3D 3.1 was used to obtain the three dimensional coordinates about the top, grip, end of javelin. And the kinematic factors of javelin calculated using Matlab2009a program. The resultant speed of javelin that affects directly to the record of performance showed 26.08 m/s indicated lower speed of about 2-3 m/s than world elite athletes. The release point appeared to have been made at the high of <TEX>$1.79{\pm}0.07$</TEX> m of 99.8% of the height of the athletes. In terms of release angle, it was indicated average <TEX>$33.0{\pm}3.81^{\circ}$</TEX> lower release angle compared to the world elite athletes. The attitude angle(up & down tilt angle, X axis) related to javelin indicated average <TEX>$38.5{\pm}4.96^{\circ}$</TEX>, its related attack angle average <TEX>$5.5{\pm}5.11^{\circ}$</TEX>, and yaw angle(sideslip, side attack angle) average <TEX>$15.7{\pm}8.48^{\circ}$</TEX>.
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