• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.415-424
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• 2021

This study aims to identify the impact of flow experience on participation and re-view of online taekwondo demonstrations on adult women, and provide practical data to revitalize online taekwondo demonstration performances, promote visitors, and promote adult taekwondo trainees. Visitors who watched the "High Kick" online taekwondo demonstration performance performed by the Kukkiwon Taekwondo Demonstration Team were selected as a population, and a total of 248 copies of the data were finally used by distributing online questionnaires. First, the difference in flow, involvement, and re-visibility due to female visitors' experiences in taekwondo is the perception, time distortion, and involvement except pleasure factors among flow sub-factors. There is a difference in the factors of re-viewing. Second, among the flow factors of online taekwondo demonstration performances, the factors of attention, pleasure, and time distortion were found to have had a positive impact on involvement. Third, the flow factor of online taekwondo demonstration shows a positive effect on the intention of re-watching. Fourth, the level of participation in online taekwondo demonstrations has a positive effect on the intention of re-watching. The results of this study suggest changes in attitudes and behavior, such as increased involvement of female visitors and intention of re-viewing, and it is believed that online performances will help establish a new non-face-to-face cultural performance system.

• Journal of the Korea Society of Computer and Information
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• v.27 no.1
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• pp.97-105
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• 2022

The purpose of this study was to analyze the effects of flossing band exercise on the range of motion and vertical jump for taekwondo demonstration athletes with ankle functional instability. The subjects of this study were 21 male Taekwondo Demonstration Team athletes enrolled at D University. They were divided into functional ankle instability group(FAIG, n=7), mild ankle instability group(MAIG, n=7), and ankle stability group(ASG, n=7). All groups performed a acute flossing band exercise program. The results of this study are as follows; dorsi flexion(p<.01), inversion(p<.01), eversion(p<.05) and vertical jump(p<.01) were significantly increased in the FAIG. Flossing band exercise of Taekwondo demonstration team with FAI increased joint range of motion and vertical jump. Therefore, it was confirmed that it could be an intervention that can improve performance and reduce the risk of ankle injury.

• 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 Digital Convergence
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• v.19 no.11
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• pp.575-583
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• 2021

This study aims to analyze Taekwondo trends according to news articles by year by applying topic modeling. In order to examine the Taekwondo trend through media reports, articles including news articles and Taekwondo specialized media articles were collected through Big Kinds of the Korea Press Foundation. The search period was divided into three sections: before 2000, 2001~2010, and 2011~2020. A total of 12,124 items were selected as research data. For topic analysis, pre-processing was performed, and topic analysis was performed using the LDA algorithm. In this case, python 3 was applied for all analysis. First, as a result of analyzing the topics of media articles by year, 'World' was the most common keyword before 2000. 'South and North Korea' was next common and 'Olympic' was the third commonest topic. From 2001 to 2010, 'World' was the most common topic, followed by 'Association' and 'World Taekwondo'. From 2011 to 2020, 'World', 'Demonstration', and 'Kukkiwon' was the most common topic in that order. Second, as a result of analyzing news articles before 2000 by topic modeling, topics were divided into two categories. Specifically, Topic 1 was selected as 'South-North Korea sports exchange' and Topic 2 was selected as 'Adoption of Olympic demonstration events'. Third, as a result of analyzing news articles from 2001 to 2010 by topic modeling, three topics were selected. Topic 1 was selected as 'Taekwondo Demonstration Performance and Corruption', Topic 2 was selected as 'Muju Taekwondo Park Creation', and Topic 3 was selected as 'World Taekwondo Festival'. Fourth, as a result of analyzing news articles from 2011 to 2020 by topic modeling, three topics were selected. Topic 1 was selected as 'Successful Hosting of the 2018 Pyeongchang Winter Olympics', Topic 2 was selected as 'North-South Korea Taekwondo Joint Demonstration Performance', and Topic 3 was selected as '2017 Muju World Taekwondo Championships'.

• Korean Journal of Applied Biomechanics
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• v.23 no.1
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• pp.19-24
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• 2013

The aim of the study was a quantitative analysis of elite athlete's $540^{\circ}$ Dwihuryeochagi and effects of ground movements to the jumping height and kicking velocity. Eleven elite players(Taekwondo demonstration team) participated in this study. In order to get the kinetic and kinematic variables, ten Vicon cameras and a force plate were used. Foot segment velocity(FSV), vertical ground reaction force(GRF), impulse, ground time(GT) in phase 1, trunk angular velocity(TAV), vertical center of gravity(COG), flight time(FT) in phase 2 and kicking leg segment velocity(KSV) in phase 3 were measured and analyzed. Results indicated that there were similar patterns of variables among phases between subjects. Non-significant correlation(r=.145) between flight time(FT) and impulse was found. Also non-significant correlation(r=.119) between center of gravity(COG) and impulse was found. In conclusions, there were similar strategies in phase 1, phase 2, and phase 3 between subjects.

• The Journal of the Convergence on Culture Technology
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• v.4 no.1
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• pp.263-273
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• 2018

This study is based on literature review intended to understand how Taekwondo demonstrations have been made from the emancipation until the 1960's in the perspective of open demonstrations. The findings of this study are summed up as follows. First, Taekwondo demonstrations were influenced significantly by social situations like the emancipation and emergence of gigan studios, dispatching ROK armed forces to the Vietnam War, or the foundation of International Taekwondo Federation(ITF). Second, in terms of forms, Taekwondo demonstrations were made as a form of demonstrating martial arts that had been improved in each of the studios when there was an examination for promotion, the studio needed publicity, or they wanted to show how individuals' skills had been cultivated. In terms of contents, with basic skills of Taekwondo as the ground, they dealt with forceful hand/foot breaking, simple jumping up and breaking, sparring, and practical self-defense martial arts, and so on.

• Korean Journal of Applied Biomechanics
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• v.31 no.3
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• pp.199-204
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• 2021

Objective: The purpose of this study was to present a new idea of methodology to evaluate Poomsae performance using inertial measurement unit (IMU) sensors in terms of signal processing techniques. Method: Ten collegian Taekwondo athletes, consisting of five Poomsae elite athletes (age: 21.4 ± 0.9 years, height: 168.4 ± 11.3 cm, weight: 65.0 ± 10.6 kg, experience: 12 ± 0.7 years) and five breaking demonstration athletes (age: 21.0 ± 0.0 years, height: 168.4 ± 4.7 cm, weight: 63.8 ± 8.2 kg, experience: 13.0 ± 2.1 years), voluntarily participated in this study. They performed three different black belt Poomsae such as Goryeo, Geumgang, and Taebaek Poomsae repeatedly twice. Repeated measured motion data on the wrist and ankle were calculated by the methods of cosine similarity and Euclidean distance. Results: The Poomsse athletes showed superior performance in terms of temporal consistency at Goryeo and Taebaek Poomsae, cosine similarity at Geumgang and Taebaek Poomsae, and Euclidian distance at Geumgang Poomsae. Conclusion: IMU sensor would be a useful tool for monitoring and evaluating within-subject temporal variability of Taekwondo Poomsae motions. As well it distinguished spatiotemporal characteristics among three different Poomsae.

• Journal of the Korea Convergence Society
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• v.12 no.11
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• pp.411-418
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• 2021

The purpose of this study was to identify contents of Taekwon and to improve specialized knowledges and practical abilities for Taekwondo majoring university students. The sample was categorized into college and student. The first round survey was divided into two parts in finding possible ways to improve practical abilities from students and school authority perspectives. The second round was conducted through survey by dividing respondents into students and school authority. The third round was performed to identify the nessessities and problems in relation to specialized knowledge and practical abilities such as sparring, poomsae, and demonstration. Based on the findings, three critical themes were identified: motivating them to accumulate specialized knowledge, providing opportunities to practice, and offering diverse job directions. Students indicated several critical themes such as recognition of job opportunities in different domains, endeavour to increase communication ability with others in different domains, reconsideration to learn things in different domains, and efforts to take an interests in life-time Taekwondo. The findings provide ideas in applying practical knowledge into the field and in changing students' perception in terms of Taekwondo majoring. They are specialized knowledge and practical ability improvement based upon college authority and students (15 college authority items, 9 student items).

• 한국체육학회지인문사회과학편
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• v.54 no.1
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• pp.515-525
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• 2015

The purpose of this study was to compare muscular activities according to the mastery of Taekwondo kicking motions with the subjects of 8 demonstration team members and 8 undergraduates in Taekwondo major at University. The muscles mainly used for Taekwondo's front kick, tornado kick, or turning hook kick are total 8 trunk muscles and 8 lower limb muscles of the kicking foot as well as the supporting foot. Analyzing the muscular activities of those areas comparatively, the study has reached the following results. At the front kick, non-experts showed higher lower abdominal muscle, biceps thigh muscle activity of the kicking foot and lateral gastrocnemius muscle activity of the supporting foot but lower 2 spinals muscular activity than experts. At the tornado kick (or turning kick), in the turning motion, experts indicated higher activity in biceps muscle of thigh and spinalis than non-experts whereas in the kicking motion, they didn't show the difference between groups except biceps thigh muscle activity. At the turning hook kick, non-experts indicated higher lateral gastrocnemius muscle activity of the kicking foot and quadricpes femoris muscle activity of supporting foot muscular activity than experts. In summary, experts tend to use their trunk in the turning motion for rapid turning and show rather low muscular activity of their kicking foot. However, non-experts indicate high muscular activity in their kicking foot and supporting foot, which means to maintain balance in the kicking motion, they tend to make use of their lower limb more than trunk muscle, and it leads to an inefficient motion.

• Korean Security Journal
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• no.31
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• pp.187-207
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• 2012

The purpose of this study was to analyze the punching movement at the horseback riding stance, one of the basic movements in Taekwondo, with 3D images and further the kinetic variables such as time, velocity, angle, angular velocity, and angular acceleration according to the types. It also aimed to examine the characteristics of each type and suggest instructional methods for the right punching movement. For those purposes, three members from the College Taekwondo Poomse Demonstration Squad were put to the test. The research findings led to the following conclusions: 1. Performance Time of the Punching Movement : In Section 1, Type 1 and 2 recorded $0.24{\pm}0.07s$ and $0.42{\pm}0.08s$, respectively, for the punching movement at the horseback riding stance. While Type 1 took less performance time in the punching movement, Type 2 took less time for take back according to each section's percentage in the total performance time. 2. Variables of Linear Velocity and Linear Acceleration : Each type recorded different linear velocity for each aspect, but the highest linear velocity represented the moment of impact for each type. Type 2 recorded the highest linear velocity in Aspect 4, which was the moment of impact. 3. Variable of Joint Angle : There were no big outer differences in the joint angle during the punching movement between Type 1 in the aspect of impact and Type 2, but the individuals assumed dynamic positions in the punching movement of Type 2 with more diverse changes to the joint angle. 4. Variables of Angular Velocity and Angular Acceleration During the punching movement of Type 1, the Aspect 3 in the moment of impact recorded angular velocity of $0.79{\pm}0.02deg/s$, $0.91{\pm}0.04deg/s$, and $5.24{\pm}0.09deg/s$ at the pelvis, shoulder, and wrist respectively. During the punching movement of Type 2, the Aspect 3 in the moment of impact recorded angular velocity of $1.32{\pm}0.03deg/s$, $0.21{\pm}0.03deg/s$, and $4.98{\pm}0.08deg/$ at the shoulder, wrist, and pelvis, respectively. In the Aspect 3 in the moment of impact in Type 2, the angular acceleration at the right wrist joint was $176.24{\pm}1.11deg/s^2$, which was bigger than that in the moment of impact in Type 1.