The purpose of this study was to examine the kinematic characteristics of delivery motion in curling game. The subjects of this study were selected in current members of male Korean national team and female University team. The three dimensional motion analysis with DLT(direct linear transformation) method was executed using four digital cameras for analyzing the experimental situation.
In this study, the delivery motion was divided into 5 events(El, E2, E3, E4, E5), and four phases(Pl, P2, P3, P4) for the data analysis.
From those, kinematical variables was calculated, and the following conclusions were drawn.
1. The height of the center of gravity of both male and female subjects showed increasing tendency as this study was proceeded from El to E2 and decreasing tendency as it was proceeded from E2 to each EVENT. 2. 2. The each distance of phases of curling delivery motion between male and female subjects was the same order(P4>P3>P2>Pl). The distance of the last phase(P4) is the longest. It is considered that this fact was occurred to pose stably at the moment of release.
3. It took the male subjects 6.32±0.57sec to deliver and also took the female subjects 7.25±0.76sec. It showed that the time required of male group was 0.93 sec faster than female group.
4. The horizontal velocity of center of gravity showed increasing tendency as it was proceeded to each event, on the other hand vertical velocity showed decreasing tendency. Making horizontal velocity faster is very important to get accurate timing effect concerning balance and connecting motion of release pose.
5. Both male and female subjects showed decreasing tendency of the trunk tilt angle at E4 and E5 which were considered importantly at the moment of curling delivery. This is supposed that the fact was occurred to send the stone to the house more correctly. At E5 right knee joint angle of female subjects(139.40±1.73°) was lower than male subjects’. At E5 right shoulder joint angle of male subjects(111.15±2.01˚) was higher than female subjects’. It is considered that this fact was occurred to ensure accuracy holding the arms out at the moment of release.