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태권도 돌려차기 시 타켓 높이에 따른 근육 활성도 분석
고석곤 ( Suk Gon Go ) 대한무도학회 2010 대한무도학회지 Vol.12 No.3
본 연구는 태권도 돌려차기 시 타켓 높이가 변화됨에 따라 몸통의 균형 유지를 위해 동원되는 좌·우 복직근, 외복사근, 내복사근, 척추기립근, 광배근의 활성도를 분석하는 것이 목적이었다. 본 연구에는 태권도 대학선수 8명(신장: 176.3±2.8 cm, 몸무게: 71.5±4.9 kg, 경력: 9.2±1.3 years)이 피험자로 참여하였으며, 각 근육들의 신호를 Telemyo 900(1000㎐)를 이용하여 수집하였다. 수집된 자료들은 피험자별로 분석하여 발차기 구간별로 산출된 평균값을 통계패키지 SPSS/PC 15.0에 입력한 후 근육들의 활성도를 발차기 높이에 따라 검증하기 위하여 독립 t-test를 실시하여 도출된 결과는 다음과 같다. 첫째, 태권도 돌려차기 동작 시 1국면에서 좌 복직근, 우 내복사근, 좌 척추기립근, 우측 광배근의 평균 적분근전도 수치는 몸통 타켓에 비해 머리 타켓에서 통계적으로 유의하게 높게 나타났다. 둘째, 태권도 돌려차기 동작 시 2국면에서 우 복직근, 우 외복사근, 우 내복사근, 좌 척추기립근, 우 척추기립근, 우측 광배근의 평균 적분근전도 수치는 몸통 타켓에 비해 머리 타켓에서 통계적으로 유의하게 낮게 나타났다. 셋째, 태권도 돌려차기 동작 시 3국면에서 좌 외복사근, 좌 척추기립근, 우 척추기립근의 평균 적분근전도 수치는 몸통 타켓에 비해 머리 타켓에서 통계적으로 유의하게 높게 나타났다. The purpose of this study was to investigate the effect of muscle activity during the teakwodo round-house kicking according to two kicking height(high: head, low: body). 8 collegiate male teakwondo players(height: 176.3±2.8 cm, weight: 71.5±4.9 kg, career: 9.2±1.3 years) with the right leg as dominant were chosen. The EMG(Electromyography) signals were recorded muscle activities by telemyo 900. Using SPSS/PC 15.0 program, it calculated measurement items, mean and standard deviation. Therefore, the normalized EMG data of measurement was to compare between the taekwondo kicking height used t-test(p<.05). The results of this study were as follows. 1. The left side of rectus abdominis, erector spinae and right side of inernal oblique activity were significantly greatest at the high kicking height In the 1 phase during the round-house kicking. 2. The right side of rectus abdominis, ineranl and external oblique, erector spinae, latissimus dorsi and the left side of erector spinae activity were significantly greatest at the low kicking height In the 2 phase during the round-house kicking. 3. The left side of external oblique, erector spinae and the right side of erector spinae activity were significantly greatest at the high kicking height In the 3 phase during the round-house kicking.
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대학 검도선수의 수준별 근력요인 및 CNTF 유전자 다형성의 특성
이재구(Lee, Jae-Koo),강병용(Kang, Byung-Yong),이형민(Lee, Hyoung-Min),고석곤(Go, Suk-Gon) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.4
The purpose of this study was to investigate the influences of the 1357G/A polymorphism in the CNTF gene on physical composition and physical fitness of male Korean kumdo players. A total of 115 kumdo players were recruited in this study, and divided into low, middle and high level groups according to individual record. Total genomic DNA was isolated from peripheral blood of participants, and the 1357G/A polymorphism in the CNTF gene analyzed by SNaPshot method. When three groups of kumdo players were compared, there were significant differences in muscle mass, upper arm muscle cumference, left and right grip strengths among three groups studied, respectively(p<.05). When the 1357G/A polymorphism in the CNTF gene were analyzed among three groups, there were no significant differences in genotype and allele distributions among three groups. However, the distribution of GG genotype and G allele were highest in high level of kumdo players, although not statistically significant. In conclusion, data from this study suggest that grip strength may be one of important factor among physical fitness factors of kumdo players. Further studies using larger sample size will be requried to clarify the precise role of the 1357G/A polymorphism in the CNTF gene.
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정규 저크(Normalized Jerk)를 이용한 태권도 돌려차기 동작 분석
조임형(Lim Hyeong Cho),강성철(Seong Chul Kang),강신배(Sin Bae Kang),박석(Sok Park),김태완(Tae Wan Kim),고석곤(Suk Gon Go),권문석(Moon Seok Kwon) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.49
The purpose of this study was to evaluate the round-house kick of Teakwondo and to compare between elite and novice Teakwondo players using the normalized jerk method. MATLAB v6.5(Mathworks Inc., USA) was employed to analyze the normalized jerk. Fourteen male subjects who had no musculo-skeletal diseases were participated and were classified into two groups(7 elite and 7 non-elite Teakwondo players). While all subjects performed the round-house kick, the height of target set up based on the center of trunk position, respectively. In this study, independent t-test (elite and non-elite) was applied to obtain the differences of normalized jerk value between the two groups. Significance level was set as p=.05. The forward backward and upward downward normalized jerk values of the kicking foot COM(center of mass) were found to be significantly different between elite and non-elite groups in the maximum knee flexion phase. Significant difference was seen in the upward downward normalized jerk value of the kicking foot COM from maximum knee flexion to impact between elite and non-elite groups(p<.05). The forward backward and upward downward normalized jerk values of the kicking foot COM were found to be significantly different between elite and non-elite groups during overall round-house kicking phase(p<.05). The left-side right-side and upward downward normalized jerk values of the whole body COM(center of mass) were found to be significantly different between elite and nonelite groups in the maximum knee flexion phase(p<.05). Significant difference was seen in the left-side right-side normalized jerk value of the kicking whole body COM from maximum knee flexion to impact between elite and non-elite groups(p<.05). The normalized jerk values of upward downward were found to be significantly different between elite and non-elite groups during overall round-house kicking phase(p<.05).
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신성휴,김태완,권문석,고석곤,박기자 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3
S. H. SHIN, T. W. KIM, M. S. KWON, S. G. GO, K. J. PARK. Analysis of the angular momentum on the lower extremity by change of starting block angles. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 165-175, 2004. The aim of this study is to show the effect of starting block angle on the starting motion of sprinters using a crouching start. After installing starting blocks on forced platform, and having four highly comparative sprinters use the starting blocks, I analyzed the angular momentum of a crouching start. From the results of the analysis, the following conclusions could be drawn: There were differences of angular momentum both in body's X, Y, and Z axes and in the thighs' X axes, but not in the pelvis and lower legs. As to the general change of block angle, we noticed that an angular momentum for each segments was higher at an angle of 50 to 55 degrees.
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