운동역학 : 여자 창던지기 경기시 투사구간의 운동학적 특성 = The Kinematical Analysis of Release Phase in Female Javelin Throwing Players

다국어 초록 (Multilingual Abstract)

The purpose of this study was to quantitatively examine the effects of kinematical characteristics on release phase, and to give the basic javelin throwing techniques in female javelin throwing players. For these purposes, javelin competitions of female javelin throwing players participating in the 81th national sports competition were filmed. Among competition filmed, 5 best competitions were selected and 3-D analyzed, and from those analyzed results, the following conclusions were drawn;
1. It was shown that the female players released the javelin with adequative release angle, but threw the javelin with less release velocity during competition. Among female javelin throwers participated in competition, S5 released javelin with the adequative release angle. but less release velocity than foreign javelin throwers of previous study. And S1 and S2 showed relatively less release velocity than the other players, so those players should increase the release velocity for the better record.
2. S5 showing the best result indicated shorter in duration time. Also generally, the shorter duration time in release phase showed the longer release distance. Especially S4 showing the worse result indicated the longer duration time in preparatory phase, causing the breakup of force Therefore to improve the record. it should be decreased the duration time in preparatory phase.
3. The players showing the better record indicated the lower rate in displacement of c.o.g compared with other players. These results were considered because the lower displacement rate of c.o.g within stride length leaded to decrease the duration time for the better record.
4. Compared with other players, S5 showing the best record indicated the higher velocity in upper arm, lower arm and hand. That is, the higher velocity of upper arm at release leaded the better velocity transfer from upper arm to, following lower arm and hand, and these action should be considered to be helpful of better record.
5. S5 showing the best record indicated the higher leaning angle and elbow angle at release than the other players. It shoulbe be considered that those higher angles leaded to increase the time on force acting on javelin and the distance accelerating on javelin, causing the increased release velocity.