• Journal of the Korean Applied Science and Technology
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• v.37 no.2
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• pp.354-361
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• 2020

The purpose of this study was to investigate the effects of regular taekwondo training on neurotrophic factors and cognitive function in obese middle-aged women. Thirty-three middle-aged women with obesity were selected for this study and randomly assigned into a control group(CG, n=18) and an taekwondo group(TG, n=15). The TG performed taekwondo training 5 times weekly for 16 weeks, while the CG did not exercise training. Serum brain-derived neurotrophic factor(BDNF), vascular endothelial growth factor(VEGF), and insulin-like growth factor-1(IGF-1) levels were analyzed and Stroop Color and Word tests were performed before and after the intervention. The serum BDNF and IGF-1 levels were significantly increased in the TG after the intervention(p<.05). On the other hand, no statistically significant differences were found in the serum VEGF levels, or in the Stroop Color and Word Test scores(p>.05). These results suggest that regular taekwondo training may be affects levels of peripheral neurotrophic factors but not cognitive function in obese middle-aged women.

• Journal of Life Science
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• v.18 no.12
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• pp.1775-1778
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• 2008

The purpose of this study was to compare the biomechanical difference of barefoot and two types taekwondo footwear. which will provide scientific data to coaches and players, to further prevent injuries and to improve each players skills. How to an effect on human body which studied a kinematics and kinetics from 8 college students during experiments. This study imposes several conditions by barefoot and two types of taekwondo footwear ran under average $3.82{\pm}0.59$ m/sec for kinetics analysis. The result of comparative analysis can be summarized as below. Friction coefficient analysis showed A Company shoes 0.60 and M Company shoes 0.61. Ground reaction force also showed that statically approximates other results from impact peak timing (p<0.001), Maximum loading rate (p<0.001), Maximum loading rate timing (p<0.001) and impulse of first 20 percent (p<0.001). Moment was M Company shoes bigger than A Company shoes to pronation moment and supination moment.

• Journal of the Korea Society of Computer and Information
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• v.27 no.7
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• pp.153-164
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• 2022

The purpose of this study is to investigate the relationship between psychological contract perceived by national taekwondo demonstration members and job satisfaction, organizational trust, and turnover intention. A total of 228 questionnaires were analyzed using SPSS 21.0 for members who experienced the national taekwondo demonstration team. Frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis and multiple regression analysis were used. First, psychological contract had a significant effect on job satisfaction, second, psychological contract had a significant effect on organizational trust, third, psychological contract had a partial negative effect on turnover intention, fourth, job satisfaction had a significant effect on organizational trust, and fifth, job satisfaction had a partial negative effect on turnover intention.

• Journal of the Korean Academy of Clinical Electrophysiology
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• v.9 no.1
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• pp.35-39
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• 2011

Purpose : The purpose of this study was to determine changes in muscle activity due to elastic taping at the rectus femoris, biceps femoris and tibialis anterior muscles using surface electromyography analysis. Methods : In this study 10 healthy university students in the Department of Taekwondo Studies were screened and individuals with a history of previous injury or surgery to their nerve, muscle, and skeletal systems, such as paresthesia and motor disorder, were excluded. Subjects were taped over the rectus femoris, biceps femoris, and tibialis anterior and their muscle activities were analyzed using the surface electromyography method during maximal voluntary isometric contraction. Results : The results of this study were as follows: muscle activities indicated a significant increase after elastic taping than before at the rectus femoris, biceps femoris, and tibialis anterior muscle. These results lead us to the conclusion that muscle activity were influenced by elastic taping at the rectus femoris, biceps femoris, and tibialis anterior muscles. Conclusion : The results of this study show that muscle activity can be improved by elastic taping at the lower limbs. These results suggest that elastic taping of muscles in the lower extremities has the capability to increase muscle activity in the body.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.01a
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• pp.261-263
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• 2011

이 논문에서는 컴퓨터 시뮬레이션의 기법을 활용하여, 이미지 처리 기법을 활용한 태권도의 새로운 품새 동작을 창작하는데 활용할 수 있는 시뮬레이션 알고리즘을 제시한다. 즉 사용자가 데이터화 한 다양한 태권도 품새 동작 이미지를 모의실험을 통하여 기존의 품새 종류보다 다양한 형태를 자동 생성하고, 이를 평가 모델화하여 동작의 완전성을 판별하고 이를 기반으로 사용자가 원하는 모델로 완성시키도록 하는 대화형 태권도 창작 품새 생성 기법과 이를 지원하는 데이터 관리 도구를 기술하여 제시한다. 또한 사용자가 원하는 환경에 따라 여러 가지 조건의 변화를 반영하고 그 각각의 결과를 보다 쉽게 얻을 수 있게 되어, 새로운 태권도 품새 개발과 표준화된 동작 모델 개발에 활용될 것으로 기대된다.

• Journal of Korean Orthopaedic Sports Medicine
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• v.8 no.1
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• pp.39-45
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• 2009

Purpose: We intended to classify the pattern and to seek the cause of fractures and/or dislocations related to middle and high school Taekwondo athletes in competition and try to get the ways for preventing them. Materials and Methods: We studied 50 fractures and dislocations of the athletes in competition, which were surveyed in 2005-2007 national middle and high school Taekwondo tournament annually. We analyzed the type and the cause of the injury, performed survey at postinjury l year in 32 cases, sought proper treatments and methods for prevention. Results: The 26 cases (52%) of foot fracture, 15 cases (30%) of hand fracture and 9 cases (18%) of forearm fracture are occurred in this study. The 9 cases (28%) of satisfaction in treatment, 15 cases (47%) of average and 8 cases (25%) of dissatisfaction are surveyed in the 32 cases. The causes of dissatisfaction are lack of rest (7 cases), excessive training (5 cases), immoderate participation of match (6 cases) and the others. The athletes were returned to the match before complete recovery in 21 cases (67%). Conclusion: The causes of fractures and dislocations in middle and high school Taekwondo athletes were stroke on upper and lower extremities and high-speed hyperflexion injury that was occurred during spraining of great toe on the floor. We consider that the athletes need the development of effective protector, improvement of equipment in stadium and enough rest and education.

• Journal of Korean Orthopaedic Sports Medicine
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• v.5 no.1
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• pp.69-74
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• 2006

Purpose: To perform the retrospective analysis of the sports injuries sustained by the college Taekwondo athletes in the respect of the injury patterns, mechanism of injury and clinical outcome Materials and Methods: This study is based on 47 out of 49 college Takwondo athletes, who had experienced the Takwondo related musculoskeletal injuries severe enough to visit the clinic for medical treatment. The mean age at the time of injury was 18.8 years and 39 were males and 8 females. The Taekwondo career was average 9.6 years and the injuries were sustained at average 6.7 years of their career. The injuries were analyzed by the detailed interview with thorough physical examination. Results: Forty-seven Taekwondo athletes in the study experienced average 1.8 injury/person (total 85 cases) with 26 persons of one time experience(55.3%), 11 persons of 2 times(23.4%),4 persons of 3 times (8.5%),5 persons of 4 times (10.6%) and 1 person of 5 times (2.2%). Injuries occurred during training in 50 cases (58.8%), while during match in 35 cases (41.2%). Injuries occurred during the attack phase of the match are 26 cases (31.7%) while 49 cases (57.6%) during the defense phase. As for the pattern of injury, fracture was the most common with 49 cases (57.6%), followed by ligament injury with 21 cases (24.7%). The upper extremity injuries were 32 cases (37.7%) while the lower extremity injuries were 44 cases (51.8%) Mode of medical treatment were operation in 15cases(17.7%), cast in 21 cases(24.7%), splint in 33 cases (38.8%), physical therapy in 15cases(17.7%) and acupuncture in 1 case(1.1%) Conclusion: Almost all the college Taekwondo athletes (96%) experienced sports injuries severe enough to receive medical treatments with the fracture being the most common injury pattern. The injuries occurred more commonly during the defense phase of the competition.

• 대한족부족관절학회:학술대회논문집
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• 2008.11a
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• pp.44-44
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• 2008

• Journal of International Academy of Physical Therapy Research
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• v.1 no.1
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• pp.65-72
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• 2010

Supposing that somatotype evaluation results would have significant differences between the public group with less amounts of exercises and the special group with intensive exercises for three to four times a day, this study aimed at comparing the mutual consistency between the results determined by somatotype evaluation tools such as visually calculated index(VCI), R$\ddot{o}$hrer's Index(RI) and Body Mass Index(BMI). The public, taekwondo players and judo players groups were composed of fifty persons, taekwondo players and judo players passed through VCI determination, respectively. Their height and weight were examined and analyzed with somatotype evaluation tools. Comparison of somatotype dispersion of RI and VCI showed that most women were determined by VCI as lean type but were determined by RI as normal type. And that women were determined by VCI as fat type but were determined by RI as normal type. Therefore both men and women showed significant differences in VCI and RI. Comparison of somatotype dispersion of VCI and BMI showed that both men and women were overestimated or underestimated by VCI rather than by BMI. Comparison of somatotype dispersion of RI and BMI showed that men were less determined by BMI as lean type compared with women; both men and women less determined by BMI rather than by RI as normal type; and both men and women, in particular, were more determined by BMI as fat type but men were more determined by BMI rather than by RI as fat type. Total somatotype consistency by tools showed that VCI has the greatest possibility of determining the public group, compared with other groups as lean type and that the consistency of the three tools were relatively higher for the taekwondo players and judo players groups, compared with the public.

• Journal of the Korea Convergence Society
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• v.11 no.10
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• pp.125-131
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• 2020

This study sought to reduce the risk of fractures in elite youth taekwondo athletes to find out the relationship between bone mineral density which are used as indicators of early diagnosis of osteoporosis and cardiorespiratory functional capacity which is an indicator of performance and sports injury the harmful to athletes. The Pearson product-moment correlation was performed to investigate the correlation between bone mineral density, cardiorespiratory functional capacity, and sports injury. The bone mineral density and cardiorespiratory functional capacity, sports injury were examined the relationship using the Simple Linear Regression. The bone mineral density were correlated with the ventilation (r=.388), and VO2max (r=.478). Bone mineral density was correlated with sports injury (r=-.292). When the bone mineral density increased by .002 and .006, the ventilation (p=.001) and VO2max (p=.006) increased by about 1. In addition, when the bone mineral density decline by .016, the sports injury increased by about 1. Improving athletes' bone mineral density can prevent sports injury, and it can be used as a sports injury prevention program in the future.