The Kinematic Characteristics of Javelin in Korean Male Javelin Throwers Following Rank

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 1.79±0.07 m of 99.8% of the height of the athletes. In terms of release angle, it was indicated average 33.0±3.81 o lower release angle compared to the world elite athletes. The attitude angle(up & down tilt angle, X axis) related to javelin indicated average 38.5±4.96 o , its related attack angle average 5.5±5.11 o , and yaw angle(sideslip, side attack angle) average 15.7±8.48 o .

The Relationship between the Distance and Kinematical Parameters of Javelin in Korean Male Javelin Throwers

“…, Lee 등 (2009), Young (2007), Morriss와 , Zatsiorsky (2000) (Böttcher & Kühl, 1998;Bosen, 1985;Lee, 2003) (Park, & Yoon, 2010;Young, 2007;Zatsiorsky, 2000;Bath & Kearney, 1996;Kearney, Bath, Prasad & Yuan, 1993). 채찍 효과에 의해서 만들어진 운동량과 관련된 투사속 도는 비행거리에 가장 큰 영향을 주는 요인 (Kim et al, 2012;Young, 2007;Viistasalo et al, 2003) (Kim et al, 2012(Kim et al, , 2013Maier et al, 2000;Best, Bartlett, & Morriss, 1993;Bartlett, Muller, Lindinger, Brunner & Morriss, 1996) (Best, Bartlett, & Sawyer, 1995;Best et al, 1993)를 보이지만, 요 각이 클 경우 창의 굽힘 현상을 유발하고 (Maier et al, 2000), −의 요 각(negative yaw angle)은 창의 장축에 대한 스핀(spin)으로 창에 마그누스 힘 (magnus lift force)을 발생시켜 창이 수직상승하게 만들어 비행거리가 짧아진다 (Bartlett et al, 1996 Figure 2. Angle definition (Zatsiorsky, 2000, Kim et al, 2013 The (Best, Bartlett, & Morriss, 1993;Mero et al, 1994;Viistasalo et al, 2003;Young, 2007 (Chae, Yoon, Lim, Lee, & Kim, 2011;IAAF, 2009;IAAF, 2007;Morriss et al, 1997;Campos et al, 2004) (Kim et al, 2012;Chae et al, 2011;Lee, 2003;Zatsiorsky, 2000;Morriss & Bartlett, Figure 3.…”

“…채찍 효과에 의해서 만들어진 운동량과 관련된 투사속 도는 비행거리에 가장 큰 영향을 주는 요인 (Kim et al, 2012;Young, 2007;Viistasalo et al, 2003) (Kim et al, 2012(Kim et al, , 2013Maier et al, 2000;Best, Bartlett, & Morriss, 1993;Bartlett, Muller, Lindinger, Brunner & Morriss, 1996) (Best, Bartlett, & Sawyer, 1995;Best et al, 1993)를 보이지만, 요 각이 클 경우 창의 굽힘 현상을 유발하고 (Maier et al, 2000), −의 요 각(negative yaw angle)은 창의 장축에 대한 스핀(spin)으로 창에 마그누스 힘 (magnus lift force)을 발생시켜 창이 수직상승하게 만들어 비행거리가 짧아진다 (Bartlett et al, 1996 Figure 2. Angle definition (Zatsiorsky, 2000, Kim et al, 2013 The (Best, Bartlett, & Morriss, 1993;Mero et al, 1994;Viistasalo et al, 2003;Young, 2007 (Chae, Yoon, Lim, Lee, & Kim, 2011;IAAF, 2009;IAAF, 2007;Morriss et al, 1997;Campos et al, 2004) (Kim et al, 2012;Chae et al, 2011;Lee, 2003;Zatsiorsky, 2000;Morriss & Bartlett, Figure 3. Correlation (Kim et al, 2012;Chae et al, 2011;Park, 2012;Lee et al, 2009;Young, 2007;Viistasalo et al, 2003 (Kim et al, 2012;Park, 2012;Chae et al, 2011;Lee et al, 2009;Young, 2007;Maier et al, 2000;…”