태권도 겨루기 선수들의 효율적인 뒤후려차기 동작 분석

강길현 ( Gil Hyun Gang ),임종남 ( Jong Nam Lim ) 대한무도학회 2009 대한무도학회지 Vol.11 No.2

태권도 겨루기 선수들의 효율적인 뒤후려차기 동작을 선수들의 숙련도에 따라 3차원적 영상분석을 통하여 신체중심이동, 동작소요시간, 족관절 각 변위, 슬관절 각 변위, 고관절 각 변위를 운동학적으로 비교분석 하였으며, Qualisys Motion System의 ProReflex MCU Camera를 컴퓨터와 연결하여 동조시켜 얻은 자료들을 산출한 연구결과는 다음과 같다. 태권도 겨루기 선수들의 뒤후려차기 동작에 있어서 신체중심이동은 이벤트 3.4에서 유의한 차이가 나타나 준비자세 에서 차는다리가 이지되는 순간에 신체중심이 회전 방향으로 빠르게 이동하면서 지지다리는 상체를 낮게 하는 것이 효율적이고, 동작소요시간을 단축하기 위해서는 지지다리의 슬관절이 최대 굴곡 되는 국면1과 2에서 유의한 차이와 국면 4에서 매우 유의한 차이한 차이가 나타나 차는 발이 임팩트 시 빠르게 이동 되어야 하고, 족관절 각 변위는 차는 다리의 고관절이 최대굴곡 되었다가 신전되면서 족관절의 신전도 빠르게 이루어져야 하며, 슬관절 각 변위는 차는다리 이벤트 5에서 유의한 차이와 지지다리 이벤트 4에서 매우 유의한 차이가 나타나 최대 굴곡 되면서 고관절도 동시에 굴곡 되었다가 임팩트 시 슬관절이 빠르게 신전되어야 한다. 고관절 각 변위는 상체의 이동이 이루어지는 동시에 차는 다리의 굴곡이 이루어져야 하고, 지지다리는 슬관절이 최대 굴곡 되므로 고관절도 최대굴곡이 이루어져야 효율적인 뒤후려차기 동작이 이루어질 수 있다. 따라서, 비우수선수집단이 뒤후려차기 동작을 효과적으로 수행하기 위해서는 태권도 발차기 동작 중에서 후려차기 동작이 완전히 이루어진 이후에 상체의 움직임과 하체 각 변위 변화로 회전을 통한 원심력을 이용한 타격력을 높여 동작을 보다 효율적으로 훈련하여야 태권도 겨루기 경기에서 선수들의 경기력 향상을 가져올 수 있을 것이다. For the kinematic analysis of the effective Taekwondo kyurogi players Dwihuryo-chagi, the 3 dimensional data was collected of differently skilled subjects by the Qualisys Motion System and the following variables were calculated the range of motion of the center of gravity, performance time, range of motion of the ankle, knee and hip angle. The results are as follows; For an effective Dwihuryo-chagi the movement of the COG at the ready posture, the kicking leg from the take off position, based on the fast rotation, the supporting leg of the leaning back upper body, will reduce the performance time. The maximum flexion of the hip joint from the phase 1 and 2 of the kicking leg to the impact, has to be quick, the knee needs to be flexed as much as possible and then extended as quick as possible while at the hip joint the flexion and extension should be performed up until the point and after the point of impact. At the hip joint the upper leg needs to be extended with the lower leg part needs to flex, the supporting leg needs to be fully extended and the hip angle needs to be at a maximum for the effective Dwihuryo-chagi. So accordingly for the training of the Dwihuryo-chagi for the unskilled players they must practice the motion of the upperbody with the motion of the lower limbs as described above to increase to the centripetal force so as to have a higher probability of striking the target with more effectiveness, which will have a positive effect in competition.

공격 시 돌려차기와 받아차기 시 돌려차기의 운동역학적 비교분석

이영림(Young Rim Lee),강길현(Gil Hyun Gang),노형준(Hyung Jun Noh) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.50

The purpose of this study was to investigate and compare the most commonly used attacking dollyeochagi and badachagi to provide coaching advice for an effective execution of the technique. The following are the results. 1. There was a significant difference for the hip angle at event 2. 2. There was a highly significant difference at event 2 for the knee angle. 3. There were no significant differences at any of the events for the ankle angle. 4. There were no significant differences at the trunk flexion/ extension angles during all phases. 5. There were significant differences of the kicking foot`s maximum ground reaction forces at the X and Y axis. 6. There were significant differences of the supporting foot`s maximum ground reaction forces at the X and Y axis. To summarize the above results for an effective kick performance, it requires the skilled coordination between the hip, knee, ankle and trunk while the overall pattern seems similar, the order of hip flexion followed by the knee flexion then the extension of the ankle joint is an important variable. According to the reaction law, it is also important for the kicking and supporting foot to push off the ground to enable the center of body to move forward quickly which helps to increase the accuracy of the impact characteristics.

태권도 경기 시 공격과 수비에 따른 돌려차기 기술에 대한 운동학적 변인 및 주동근 비교분석

이영림(Lee, Young-Rim),강길현(Gang, Gil-Hyun),정용안(Jung, Yong-An) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.4

The purpose of this study was to investigate the differences between the muscle activity of the agonist muscles and kinematics during the attacking and defensive dollyochagi, 4 elite taekwondo players participated and through the understanding of these differences more scientific training principles may be provided. 1. There was highly significant differences for the kicking legs hip angle, knee angle at the moment of take off as well as there was a significant difference between the maximum knee flexion angle. 2. As for the muscle activity there were significant differences at lumbar erector spinae and gastrocnemius from the ready position to the take off of the kicking foot between the attacking and defensive dollyochagi. There was a significant difference between the rectus abdominis between the kicks from the take off to the maximum knee flexion angle. For the knee extension phase, from the maximum knee flexion angle to the knee extension (impact), there were significant differences at the rectus abdominis, rectus femoris, tibialis anterior and gastrocnemius.

효율적인 돌려차기 동작을 위한 공격 시와 받아차기 시 운동학적 분석

함우택(Ham Woo-Taek),강길현(Gang Gil-Hyun),백문종(Baek Mun-Jong) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.3

The purpose of this study was to investigate the kinematic variables of an effective attack and defensive motion dollyochagi motion, which is one of the most popular kicks during competition gyorugi so as to be able to provide scientific background during training. 1. There was statistically significant differences at the event E2 for the hip angle. 2. There was highly statistically significant differences at the event E2 for the knee angle. 3. There were no significant differences during all the phases for the ankle angle. 4. There were no significant differences during all the phases for the trunk angle. According to the results from above, even though the motion requires very complicated coordination, in general the hip, knee, ankle and trunk angle were similar for the attacking dollyochagi and the defensive dollyochagi. The most important variable for the effective performance of the dollyochagi is the flexion of the hip, knee and ankle at the kicking foot’s takeoff which will help enable a more powerful quicker kick which is needed during competition.

태권도 몸돌려후려차기의 지면반력 변인 분석

하철수(Ha Chul-Soo),이영림(Lee Young-Rim),강길현(Gang Gil-Hyun) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.3

The purpose of this research was to provide basic scientific information that can be used for the safety in the training of the momdollyo huryo chagi, To do this the analysis of GRF data from skilled and unskilled practitioners was performed. 3 national level Korean players and 3 unskilled players participated in this research. The t-test was done on the following variables were recorded; performance time. anteroposterior ground reaction force (GRF). mediolateral ground reaction force, vertical ground reaction force. peak ground reaction force Here are the results; For the performance time in phase 1 and 2 there was a significant time difference. while in phase 4 there was a statistically significant time difference. For the mediolateral GRF at event 1 there was a significant difference, and at event 5 there was a significant difference but for the anteroposterior GRF s there were no significant differences. At event 1 and 3 there was a significant difference in the vertical GRF. and there was a significant difference between the peak GRFs. The conclusions of the above results indicate that the supporting foot during the performance of the momdollyo huryo chagi is very important from the start to the finish of the technique. At the point of the kicking legs impact the hip must be maximally flexed which is highly influence by the vertical GRFs. Through this it can be known that for the effective performance of the momdollyo huryo chagi not the safety. the production of a higher vertical GRF is needed to increase the performance of the technique.

태권도 종목별 돌려차기 수행 시 하지분절 및 타격력에 대한 운동역학적 비교분석

이영림(Lee, Young-Rim),최만호(Choi, Man-Ho),하철수(Ha, Chul-Soo),강길현(Gang, Gi-Hyun),노형준(Noh, Hyung-Jun) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.2

The purpose of this study was to investigate the differences in the impact force from the dollyochagi for three different types(Poomsae, kyokpa and kyorugi) of taekwondo players. The total of 9 elite players weighing from 68 kg to 74kg participated in this experiment of each type of 3. Kinetics and kinematics were recorded by force platforms and motion capture system while the impact force of the kick was recorded by the electronic hogu. The following variables were analyzed; performance time, ankle, knee and hip angles and moments and impact force. To conclude the poomsae group were the most accurate, skilled and representative because of the training of blocking and defensive motions included however they had the lowest impact force which implies that they need to train this. With the characteristics of the kyokpa group being that of accuracy, high intensity the variables show that there was a high level of coordination between the lower limbs and at impact they had a high rotational power. It could be seen for the kyorugi group that they had a high speed with a powerful impact due to the high speed of internal hip rotation which is an important variable. Even though the various styles of taekwondo players poomsae, kyokpa and kyorugi train differently there is a high level of expertise to coordinate between the lower limbs which twisting the trunk and pushing their body forward to ensure a high impact force.