Impact of Prolonged Chronic Resistance Training on Central Blood Pressure and Arterial Stiffness in Professional Bodybuilders 장기간의 저항성 트레이닝이 전문 보디빌더의 중심 동맥 혈압 및 경직도에 미치는 영향
이동현 Lee Donghyun , 박원일 Park Wonil , 이재성 Lee¸ Jaesung , 백형진 Baek¸ Hyungjean , 홍광석 Hong¸ Kwang-seok
Impact of Prolonged Chronic Resistance Training on Central Blood Pressure and Arterial Stiffness in Professional Bodybuilders 장기간의 저항성 트레이닝이 전문 보디빌더의 중심 동맥 혈압 및 경직도에 미치는 영향
이동현 Lee Donghyun , 박원일 Park Wonil , 이재성 Lee¸ Jaesung , 백형진 Baek¸ Hyungjean , 홍광석 Hong¸ Kwang-seok
DOI:10.23949/kjpe.2023.7.62.4.1
Abstract
Central arterial stiffness and other hemodynamic parameters are notably impacted by regular resistance training duration/intensity and subject characteristics such as gender and age. Therefore, this study compared cardiovascular functions among three groups: sedentary individuals without any exercise program engagement within the past six months (SED, n=16), resistance training enthusiasts (RT, n=16), and professional bodybuilders (BD, n=12). All groups were evaluated for brachial and central blood pressure, central arterial stiffness, pulse wave analysis, and vascular endothelium-dependent vasodilation. Brachial systolic blood pressure in the BD group was substantially higher than RT and SED groups (p=.008), and the BD group’s central systolic blood pressure was significantly higher than RT group (p=.029). The BD group’s central pulse pressure was markedly greater than SED group (p=.031). Additionally, the BD group’s pulse wave velocity and transit time were both faster than those in the RT group (velocity, p=.002; time, p=0.09). While the magnitude of the backward pressure wave returning from the peripheral vascular beds in the BD group was more prominent than in the SED group (p=.032), there was no difference in the endothelium-dependent vasodilation between groups (p>.05). Overall, this study concludes that prolonged high-intensity resistance training may increase central arterial stiffness despite having negligible effect on vascular endothelial function. However, as resistance training effects on cardiovascular function remain unclear, further studies are needed to determine whether long-term and vigorous resistance training effectuates physiological adaptations or pathological abnormalities in the cardiovascular system.
A New Light on the Status and Perception for the Human Rights in Sports: Focused on the College Student-Athletes 스포츠인권 실태 및 인식에 대한 새로운 조명: 대학교 학생선수를 중심으로
임용석 Yim¸ Yong Suk , 천종문 Cheon¸ Jong Mun , 홍덕기 Hong¸ Deock Ki
A New Light on the Status and Perception for the Human Rights in Sports: Focused on the College Student-Athletes 스포츠인권 실태 및 인식에 대한 새로운 조명: 대학교 학생선수를 중심으로
임용석 Yim¸ Yong Suk , 천종문 Cheon¸ Jong Mun , 홍덕기 Hong¸ Deock Ki
DOI:10.23949/kjpe.2023.7.62.4.2
Abstract
The purpose of this study was to examine the status and perception of the human rights in sports for college student-athletes. The participants in the study were 30 college student-athletes(male: 21, female: 9) based on sports category, grades, gender, and region. The data were collected based on in-depth interviews. The data were analyzed based on the domain analysis and classification analysis. As a result of this study, three themes emerged: ‘human rights sensitivity: a premise to break the solid succession structure’, ‘the multi-layered human rights violation conditions: the limitation of the previous policy’ and ‘an extension of the human rights in sports: new concepts that haven’t been noticed’. Based on the results, future directions were suggested.
Key Words
대학운동부, 학생선수, 스포츠인권, 인권감수성, 자기 결정권, Collegiate athletics, Student-athletes, Human rights in sports, Human rights sensitivity, Self-determination right
A Study on How to Improve Current Ethics Education in Sports 현행 스포츠윤리교육 문제에 대한 고찰
The purpose of this study is to improve the effectiveness of sports ethics education by examining the problems and causes of current sports ethics education and suggesting improvement plans. To this end, first, an open questionnaire and in-depth interview were conducted with 5 sports ethics related experts. The collected data was classified into three frames: personal problems, organizational/collective problems, and social/environmental problems, and problems were analyzed, and improvement plans were derived. The results of the study are as follows. As for the problems of sports ethics education, first, personal problems were ‘fatigue of education’, ‘difficulty in application to sports field’, and ‘absence of awareness of necessity of education’. Third, social/environmental problems appeared as ‘compulsoryness of education’, ‘conceptual mixed use of sports ethics’, and ‘lack of administrative and financial support’. Fourth, current sports ethics The improvement measures for educational problems were ‘customized, communication, and experiential education and reflective practice education’, ‘systematization of knowledge and curriculum’, ‘expansion of major instructors’, and ‘administrative and financial support’. In order to practically improve unethical problems in the sports world through education, all stakeholders can diagnose the reality and transform into effective education under the will and institutional support to overcome the limitations of the current sports ethics education and continuously improve. Active effort will be required.
Analysis of YouTube Content Comments about Korea National Contemporary Dance Company 국립현대무용단에 관한 유튜브 콘텐츠 댓글 분석
이윤경 Lee¸ Yoon Kyung
DOI:10.23949/kjpe.2023.7.62.4.4
Abstract
The purpose of this study is to explore the areas of public interest and preferred content types in the National Contemporary Dance Company by analyzing comments on content related to the National Contemporary Dance Company. From 2014 to 2022, comments on contents related to the National Modern Dance Company uploaded to YouTube were collected, and word frequency analysis and topic modeling were conducted after the data purification process. As a result of the word frequency analysis, “dance” was the highest frequency, and it was derived in the order of “National Modern Dance Company,” “Modern Dance,” “Video,” “Performance,” “Choreographer,” “Choreography,” “Dancer,” “Body,” and “Good.” According to the results of the topic modeling study, a total of six topics were derived. First, it was found to be “Impression of Behind Story,” second, “Modern Dance Gifted Kim Min-ji,” third, “Performance Highlight Video,” fourth, “Impression of Art Expressing with Body,” fifth, “Lecture on the Choreography Process,” and sixth, “Choreographer Kim Bo-ram.” Through the results of this study, it was confirmed that the public was interested in performance videos, choreographers, and dancers, and expressed positive emotions about them in comments.
Key Words
국립현대무용단, 현대무용, 유튜브, 콘텐츠, 빅데이터, 댓글, National contemporary dance company, Contemporary dance, YouTube, Content, Big data, Comments
The Process of the Introduction and Establishment of Women's Bodybuilding in South Korea 한국 여성 보디빌딩의 도입과 정착 과정
The Process of the Introduction and Establishment of Women's Bodybuilding in South Korea 한국 여성 보디빌딩의 도입과 정착 과정
하정희 Ha¸ Jung-hee , 김재우 Kim¸ Jae-woo , 등욱 Deng¸ Xu
DOI:10.23949/kjpe.2023.7.62.4.5
Abstract
This study examines the process of the introduction and establishment of women's bodybuilding in South Korea. The interest in bodybuilding grew as fitness clubs emerged in the 1970s, leading to increased participation of women in these clubs. The presence of foreign women bodybuilders was introduced to Korean society through photographs and articles published by various newspapers. In 1980, the first competition allowing women bodybuilders to participate was held, marking the official beginning of women's bodybuilding in Korea. With extensive support from the Korean Bodybuilding Federation in 1988, female bodybuilders began participating in international competitions and achieved notable results, solidifying women's bodybuilding as a recognized women's sport. As prominent male bodybuilding competitions in Korea established women's divisions, female bodybuilders gained expanded opportunities to compete and achieved an equal status and position with men. Additionally, as the effectiveness of women's bodybuilding was recognized and a shift in perception occurred, it started to gain popularity among the general public, paving the way for its mainstream acceptance.
Key Words
여성 보디빌딩, 보급, 정착, Women, s bodybuilding, Promotion, Establishment
Oral Life History of Sae-wan Yoon, the Main Contributor to the Introduction and Advancement of Disability Sports and Wheelchair Rugby in South Korea 국내 장애인스포츠 발전과 휠체어 럭비 도입에 공헌한 윤세완의 구술생애사
Oral Life History of Sae-wan Yoon, the Main Contributor to the Introduction and Advancement of Disability Sports and Wheelchair Rugby in South Korea 국내 장애인스포츠 발전과 휠체어 럭비 도입에 공헌한 윤세완의 구술생애사
임상훈 Yim¸ Sang-hun , 조가람 Jo¸ Ga-ram
DOI:10.23949/kjpe.2023.7.62.4.6
Abstract
This study aims to reexamine the life of Yun Se-wan, who has contributed to the introduction and development of wheelchair rugby in South Korea, in order to shed light on how wheelchair rugby, considered a representative sport for individuals with severe disabilities, has been introduced and evolved domestically. The research applied the oral history research method, conducting interviews with Yun Se-wan, and collected and analyzed materials such as articles, photographs, and documents. As a result, Yun Se-wan's life, which had influenced the introduction and development of wheelchair rugby in South Korea, could be summarized in four main aspects. Firstly, through Yun Se-wan's growth process, the background of his entry into disability sports could be understood. Secondly, Yun Se-wan experienced the frustration and limitations of disability sports through his employment and resignation from the Paralympic Committee. Thirdly, his experience as a disability sports coach at Samyook Rehabilitation Hospital became a catalyst for forming beliefs in the value and dedication of disability sports. Lastly, through his experience in the introduction and growth of wheelchair rugby, the challenges and potential of wheelchair rugby as a disability sports discipline could be explored, emphasizing the need for the establishment of professional teams, which could ultimately contribute to improving the quality of life for individuals with severe disabilities. Yun Se-wan's life revealed through this study can serve as a valuable historical foundation for the introduction and development of wheelchair rugby in South Korea.
Exploring Factors Related to the College Student-athletes and Instructors’ Perceptions of Human Rights in Sports 대학운동부 선수 및 지도자의 스포츠인권 인식과 영향요인 탐색
박세윤 Park¸ Seyun , 천종문 Cheon¸ Jong Mun , 홍덕기 Hong¸ Deock Ki
DOI:10.23949/kjpe.2023.7.62.4.7
Abstract
The purpose of this study was to examine the factors related to the college student-athletes and instructors’ perceptions of the human rights in sports. The participants in the study were 2,938 college student-athletes(male: 2,247, female: 691) and 302 instructors(male: 270, female: 32). The data were collected based on the online survey regarding the perceptions of the human rights in sports. The data were analyzed using the descriptive statistics, independent t-test, one-way ANOVA, and two-way logistic regression analyses. The results were as follows. First, it was confirmed that female student-athletes, student-athletes who play non-contact sports, student-athletes who had prize winning experiences, and student-athletes who use private accommodations have generally high sports human rights perceptions and its’ factors. Second, it was confirmed that the college instructors who had prize wining experiences, individual sports, and non-contact sports have generally high sports human rights perceptions and its` factors. Based on the results of this study, discussions and future directions were suggested.
Key Words
대학운동부, 학생선수, 지도자, 스포츠인권, 선수 권리, Collegiate athletics, Student-athletes, Instructors, Human rights in sports, Athletes’ rights
The Structural Relationships among School Physical Service Quality, Educational Performance, Satisfaction, and Behavioral Intention: Focusing on Taekwondo Education Support Project in Middle and High School 학교체육 교육서비스품질과 교육성과, 만족, 행동의도의 구조적 관계: 중·고교 태권도 수업 지원 사업을 중심으로
The Structural Relationships among School Physical Service Quality, Educational Performance, Satisfaction, and Behavioral Intention: Focusing on Taekwondo Education Support Project in Middle and High School 학교체육 교육서비스품질과 교육성과, 만족, 행동의도의 구조적 관계: 중·고교 태권도 수업 지원 사업을 중심으로
The purpose of the present research study is to test the structural relationship between physical education service quality and educational performance, satisfaction, and behavioral intention, with a focus on middle and high school Taekwondo class support projects. To achieve the purpose of this study, a total of 320 questionnaires were distributed to students who participated in middle and high school taekwondo classes for more than one semester, and then 276 samples were used for the data analysis including. Frequency analysis, reliability analysis, confirmation factor analysis, correlation analysis, and structural equation model analysis. Among the educational service quality factors, tangibility and empathy have positive impacts on educational performance, while reliability, responsiveness, and assurance do not. Moreover, among the educational service quality factors, reliability and empathy have positive impacts on satisfaction, while tangibility, responsiveness, and assurance do not. Next, among the quality of educational services, tangibility and responsive have positive impacts on behavioral intention, while reliability, assurance, and empathy do not. In addition, it was found that educational performance had positive impacts on satisfaction. Lastly, it was also found that educational performance had positive impacts on behavioral intention and satisfaction had positive impacts on behavioral intention.
Key Words
학교체육, 중ㆍ고교 태권도 수업 지원 사업, 교육서비스품질, 교육성과, 만족, 행동의도, School physical education, Middle and high school taekwondo class support project, Educational service quality, Educational performance, Satisfaction, Behavioral intention
Relationship between Online Marketing Attributes Using SNS Conducted by Fitness Centers and Consumers' Cognitive and Emotional Responses 피트니스센터에서 실시하는 SNS를 활용한 온라인 마케팅 속성과 소비자의 인지적 반응 및 정서적 반응의 관계
Relationship between Online Marketing Attributes Using SNS Conducted by Fitness Centers and Consumers' Cognitive and Emotional Responses 피트니스센터에서 실시하는 SNS를 활용한 온라인 마케팅 속성과 소비자의 인지적 반응 및 정서적 반응의 관계
박성배 Park¸ Sung-bea
DOI:10.23949/kjpe.2023.7.62.4.9
Abstract
This study aims to empirically examine the relationship between online marketing attributes using SNS at fitness centers and consumers' cognitive and emotional responses. In order to examine the purpose of this study, a survey using the convenience sampling method was conducted from June 2022 to November 2022, and the survey was conducted by obtaining consent after fully explaining the purpose of the survey and using a self-evaluation entry method in which respondents responded directly. 450 copies were recovered, and 442 copies were used for the final analysis, excluding 8 copies that were omitted or showed reaction immobilization. For the data, frequency analysis, exploratory factor analysis, confirmatory factor analysis, reliability analysis, correlation analysis, and path analysis using structural equation model were conducted using Stata 14.0 ver. As a result, information, interaction, and playfulness of online marketing attributes all had a statistically significant effect on consumers' cognitive responses, and consumers' cognitive responses had a statistically significant effect on emotional responses. In addition, it was found that cognitive reactions were mediated between the information, interaction, playfulness, and consumer emotional reactions of online marketing attributes. These results suggest that the information, interaction, and playfulness of line marketing attributes are major marketing attributes that bring positive cognitive emotions of consumers and even experience a favorable emotional response to the center.
Key Words
피트니스 센터, 온라인 마케팅, 인지적 반응, 감정적 반응, Fitness center, Online marketing, Cognitive response, Emotional response
A Case Study of the Leisure Activities of Serious Leisure Simmers in a Pandemic 팬데믹 상황에서 진지한 여가 수영참여자의 여가활동에 관한 사례연구
This study aimed to understand, what kind of effect Covid-19 “pandemic” has on participants who participate in swimming as serious leisure, which is a concept that contrasts with everyday leisure, and participants who participate in swimming as serious leisure. It tried to figure out how to deal with the fundamental phenomenon. To this end, 10 serious leisure swimmers who worked hard to sustain their leisure time during the pandemic were selected as nomadic specimens, and case studies were conducted through inductive analysis.
As a serious leisure, the meaning of “participating in swimming” appears as a “part of life” and “sustainable benefits and rewards”, and the fundamental phenomenon is an internal constraint such as anxiety caused by the risk of Covid-19 infection, and swimming in a fundamental situation. The peripheral gaze of others and the spouse's opposition about going. Structural constraints that included constrains on entering the pool due to epidemic prevention passes. With this, it was shown how that such fundamental constrains would be dealt with through leisure restriction negotiations, and the leisure restriction negotiations included negotiations for society generally and negotiations for on behalf of swimmers. Negotiations beyond swimming included temporary breaks in training and the emergence of other exercise alternatives, while negotiations for swimming shifted the leisure space from public to private swimming, using resources such as open water swimming as a solution being the public least affected by social distance. There were also cases of negotiation of leisure constrains through online competitions.
Prediction of the Korean Professional Baseball Team's Batting Variables to Advance to the Playoffs using Machine Learning 머신러닝을 활용한 플레이오프 진출을 위한 한국프로야구구단의 타격변수 예측
Prediction of the Korean Professional Baseball Team's Batting Variables to Advance to the Playoffs using Machine Learning 머신러닝을 활용한 플레이오프 진출을 위한 한국프로야구구단의 타격변수 예측
배정섭 Bae¸ Jung-sup
DOI:10.23949/kjpe.2023.7.62.4.11
Abstract
The purpose of this study was to predict the batting variables for Korean professional baseball teams to advance to the playoffs using machine learning. Dataset was constructed based on hitter data from the regular season of Korean professional baseball over the past 10 years from 2013 to 2022. The data were collected through the official website of the Korea baseball organization (KBO) and KB report (www.kbreport.com), a baseball statistics website. In this study, the result variable was set as whether to advance to the playoffs, and the explanatory variable was set as an indicator (hit, double, triple, home run, steal, walk, strikeout, double play, sacrifice bunt, batting average, on-base percentage, slugging percentage, OPS). In order to predict the model for Korean professional baseball teams to advance to the playoffs, the model was created and analyzed through random forest, decision tree, logistic regression analysis, SVM, KNN, and Neural Network. As a result of the analysis, the evaluation index in the decision tree was identified as AUC: 99.8%, the regular CA was 96.9%, precision: 97.0%, Recall: 96.9%, and F1: 96.9%, which were measured as the most suitable. In the priority analysis, on-base percentage, OPS, and sacrifice fly were measured the highest, while sacrifice bunt and double play were ranked low. This study is meaningful in that Korean professional baseball teams presented predictive models of batting variables in deriving results for advancing to the playoffs. It is also meaningful that it has proven the priorities of major hitting variables suggested by Saber Metrics such as on-base percentage and OPS.
Key Words
머신러닝, 플레이오프 진출, 한국프로야구, 타격변수, 데이터 사이언스, machine learning, Korean professional baseball, advance to the playoffs, batting variables, data science
Analyzing the Effect of Features of College Sports Magazine Instagram Contents on Users Intention of Continuous Usage: Focusing on the Planned Behavior Theory 대학스포츠 학보사의 인스타그램 콘텐츠 특성이 이용자의 지속이용의도에 미치는 영향: 계획행동이론을 중심으로
Analyzing the Effect of Features of College Sports Magazine Instagram Contents on Users Intention of Continuous Usage: Focusing on the Planned Behavior Theory 대학스포츠 학보사의 인스타그램 콘텐츠 특성이 이용자의 지속이용의도에 미치는 영향: 계획행동이론을 중심으로
College sports magazine is one of the main media outlets. In this research, the authors analyzed the relationship between college sports magazine Instagrams’ contents and users’ intention of continuous to use them. Based on the users of college sports magazine Instagram, the purpose of this study was to reveal the relationship between college sports Instagram contents features and attitudes, as well as the predicting variables of the planned theory and user continuous intention. In order to achieve this purpose, the users of the college sports magazine Instagram were set as a research population and used convenient sampling, one of the non-probability sampling methods, to collect samples. An online survey was sent out to participants, and 177 were collected and used for analysis. A path analysis was performed to meet the purpose of the study, and the authors used SAS 9.2 For Windows and AMOS 23.0 statistics programs for analysis. As a result, first, college sports Instagrams’ content features, informativeness, entertainment, and interaction all showed a positive causal effect on users’ attitudes. Second, predicting variables of planned behavior, attitude, subjective norms, and perceived behavior control were all shown to have significant causal effects on users’ continuous intention to use a college sports magazine’s Instagram channel. Finally, further discussion regarding how college sports magazines should implement the study’s results and future research options are provided.
Key Words
콘텐츠 속성, 계획행동이론, 대학스포츠, 대학스포츠 학보사, 인스타그램, Contents feature, Theory of planned behavior, College sports, College sports magazine, Instagram
Effect of Warm-Up Intensity in Anaerobic Exercise Performance and Athletic Performance for Short Distance Short Track Elite Athletics 웜업 강도가 쇼트트랙 단거리 선수의 무산소성 운동수행능력과 경기력에 미치는 영향
Effect of Warm-Up Intensity in Anaerobic Exercise Performance and Athletic Performance for Short Distance Short Track Elite Athletics 웜업 강도가 쇼트트랙 단거리 선수의 무산소성 운동수행능력과 경기력에 미치는 영향
The purpose of this study is to provide data for efficient warm-ups by comparing blood lactate concentration and impacts of anaerobic exercises from high-intensity warm-up and moderate-intensity warm-up for short track speed skaters. of twelve short track speed skaters participated in the study. All were subjected to HIW(HRmax 80-90%) or MIW(HRmax 50-60%). After each warm-up, 30 seconds ergometer cycle test or short track 500m time trial were conducted twice. The time required for HIW and MIW was confirmed. After two 30 second ergometer cycle tests, peak power output and blood lactate concentration were measured. In addition the peak power output was meaningfully higher after HIW than MIW. blood lactate concentration was significantly higher in HIW than in MIW immediately after warm-up, after the first test, three minutes after the first test, after the second test and thirty minutes after second test. In the short track 500m time trial, in the first and twice record, HIW decreased with a meaningful difference compared to MIW. conclusion, when performed specified to characteristics of short track 500m, HIW increases anaerobic performance ability in both competition and improves the competition performance compared to MIW.
Key Words
웜업, 쇼트트랙, 무산소성 운동수행능력, 혈중 젖산 농도, 경기력, Warm-up, Short track speed skating, Anaerobic performance, Lactate, Time trial
The Policy of Support Plan for Improvement of Korean Women’s Handball on International Competition Level 한국 여자 핸드볼 국제대회 경기력 향상을 위한 정책지원 방안
The Policy of Support Plan for Improvement of Korean Women’s Handball on International Competition Level 한국 여자 핸드볼 국제대회 경기력 향상을 위한 정책지원 방안
주성택 Ju¸ Soung-teg , 안정현 An¸ Jeonghyeon
DOI:10.23949/kjpe.2023.7.62.4.14
Abstract
The purpose of this study was to suggest enhancing performance by identifying factors of Korean women’s handball performance declination at the international competition level. This study is based on in-depth interviews of international handball experts such as the Chairman of Technical Committee, one former head coach of women’s national team, one of each from the players and coaching staff of national team, and also on a literature study through research of data. Three factors listed below came out as results; First, the findings showed a lack of continuity in the development system under the national team and its continuity failure to the national team, and next, it was found ineffectiveness in the Korean national reserved player. Third, an eudcation system and support for coaches of talented young players under senior national players are absent.
Based on those, firstly, launching a new business for U-23 Junior players in the Korea Olympics Committee is necessary. A practical way of selecting talented young players from extended wide range of age groups comes in second. Third, guaranteeing full-time job contracts to coaches of talented young players is needed. Securing the cumulative data of talented young players in long-term is fourth suggestion.
Key Words
정책지원 방안, 한국 여자 핸드볼, 국제대회, 경기력 하락, 요인, policy of support plan, Korean women handball, performance declination, international competition level, factors
A Comparative Analysis of the Implementation Level of Good Governance by the KSOC’s Governing Bodies of Sport: By Applying the Sport 4 Good Governance Evaluation Model 대한체육회 회원종목단체의 굿 거버넌스 이행수준 비교분석: S4GG 굿 거버넌스 평가모델 적용
A Comparative Analysis of the Implementation Level of Good Governance by the KSOC’s Governing Bodies of Sport: By Applying the Sport 4 Good Governance Evaluation Model 대한체육회 회원종목단체의 굿 거버넌스 이행수준 비교분석: S4GG 굿 거버넌스 평가모델 적용
The purpose of this study is not only to evaluate and compare the level of implementation of good governance by the national governing bodies of sport under the Korean Sport & Olympic Committee by applying S4GG(Sport 4(for) Good Governance) Model but also to derive policy implications for the implementation of good governance by them. The paper evaluates the level of implementation of good governance by the Korea Taekwondo Association(Group ‘가’), the Korea Basketball Association(Group ‘나’), and the Korea Archery Association(Group ‘다’). The three bodies of sport were selected as a subject of study for each evaluation group through a purposive sampling method by considering the criteria for classifying the evaluation group of “Sports Organization Innovation Evaluation”. The paper identifies similarities and differences in the evaluation results for five principles and 14 detailed indicators. The policy implications in terms of the similarities and differences are as follows.
First, the three organizations should enhance administrative transparency by disclosing data related to budget and finance on their website. Second, the Korea Taekwondo Association should disclose its own “Code of Ethics” on its website and manage it so that all members comply with it. Third, the Korea Taekwondo Association and the Korea Basketball Association should establish a system to guarantee stakeholders’ participation and speaking rights by referring to the cases of the Korea Archery Association, and create an open communication atmosphere to freely present opinions and accept critical demands. In particular, the relatively small Korean Archery Association’s overall excellent level of implementation of good governance has great implications for large sporting organizations in the “A” and “B” groups.
Key Words
굿 거버넌스, S4GG, 스포츠조직, 회원종목단체, Good governance, Sporting organization, Governing bodies of sport
Analysis of Judge's Objectivity of Winter Olympic Games Mogul Events 동계올림픽 모글 심사결과의 객관도 분석
Analysis of Judge's Objectivity of Winter Olympic Games Mogul Events 동계올림픽 모글 심사결과의 객관도 분석
김주용 Kim¸ Ju-yong , 석진수 Suk¸ Jin Su
DOI:10.23949/kjpe.2023.7.62.4.16
Abstract
The purpose of this study is to confirm the objectivity of the Winter Olympics mogul results and to provide basic data for various empirical studies using various competition data. So this study analyzed data was the results of the 2018 Pyeongchang Winter Olympics and 2022 Beijing Winter Olympics. For the study, the final results of the two Winter Olympics were downloaded from the FIS website and organized using Windows Excel 2021, and Windows SPSS 26.0 was used for statistical analysis to confirm the objectivity of the Winter Olympic results. For the organized data, descriptive statistics were conducted according to gender and competition classification, and ICC (Intraclass Correlation Coefficient) was calculated to confirm objectivity. The objectivity recognition standard was set at 0.80. As a result of the study, ICC was calculated that was much higher than the accreditation level in all results, and the results of the Mogul screening for the Winter Olympics tended to have a high level of objectivity. In addition, it was confirmed through the research results that the objectivity of the final score result increases when the effective score through trimmed score is used in the turn standard score and the turn deduction score that use the effective score through final score in determining. It is thought that it will be helpful to establish and operate a judge system that can achieve fairer and objective screening results by analyzing the results of various international competitions as well as the Olympics to identify various problems that may appear in subjective judge results.
Effects of Different Types of Sports Activities on Physical Literacy and Cognitive Function in a Child 아동의 스포츠 활동 참여 유형이 Physical Literacy와 인지기능에 미치는 영향
Effects of Different Types of Sports Activities on Physical Literacy and Cognitive Function in a Child 아동의 스포츠 활동 참여 유형이 Physical Literacy와 인지기능에 미치는 영향
The purpose of the study was to compare Physical literacy (PL) and cognitive function among children participating in different sports events. A total of forty-two children, who had been engaged in soccer (N=11), Taekwondo (N=13), and jump rope (N=18) for over a year, were recruited for the study. PL and cognitive function were assessed using the Canadian Assessment of Physical Literacy version-2 (CAPL-2) and the Psychology Experiment Building Language (PEBL) respectively. The results indicated that The soccer group exhibited a significantly higher level of PL compared to both the jump rope and Taekwondo groups (p<.05). When analyzing the sub-domains, the soccer group demonstrated a significantly greater level of physical competence compared to the jump rope and Taekwondo groups (p<.05). However , no significant difference was observed between the groups in other sub-domains such as behavioral, motivation and confidence, knowledge and understanding. Regarding cognitive function, the soccer group displayed a significantly higher level of reaction time in Psychomotor Vigilance Task (PVT) compared to the jump rope and Taekwondo groups (p<.05). The number of correct responses and reaction time in the PVT task were significantly associated with PL scores and the physical competence domain (p<.05). These finding confirmed that participation in sports activity, particularly soccer, is crucial for enhancing both PL and cognitive function. Furthermore, they emphasize the necessity of promoting PL through sports activities during childhood to foster cognitive development.
The purpose of this paper is to examine the extent to which sport is based on meritocracy and whether the praise of successful athletes is justified in terms of meritocracy. To do so, I first summarize the concept of meritocracy by reviewing the domestic and international literature on meritocracy and examine its fundamental limitations from the perspective of fairness. Next, I analyze the debate among prominent sport philosophers on the role of luck in sport, which affects the outcome of a game but is unrelated to a player’s ability, and whether it should be accepted or not. Finally, I apply the concept of meritocracy to sport to examine the extent to which sport follows meritocracy and considers whether our praise for successful athletes is justified in terms of it. I argue that even if the achievements of successful athletes are intrinsically valuable, if the decisive factor of their success is the luck of the genetic lottery, the praise of the winners is not justified. Rather, our praise of athletes should be based on their hard work and good sportsmanship, not on their genetic talents.
Research Trends of Cheerleading: Focusing on Journals Registered in the Republic of Korea and the United States of America 치어리딩의 연구동향: 한국과 미국 학술지를 중심으로
Research Trends of Cheerleading: Focusing on Journals Registered in the Republic of Korea and the United States of America 치어리딩의 연구동향: 한국과 미국 학술지를 중심으로
This study aims to present academic data for the future development direction of cheerleading in the Korea by analyzing ‘Research Trends of Cheerleading’ based on research papers published in academic journals in the Korea and the USA. To probe research trends, a total of 203 studies(57 studies in Korea, 146 studies in the USA) for 70 years from 1953, the study’s starting point, to 2022, to explore the differences and similarities between cheerleading studies in Korea and the USA. To achieve the purpose of the study, studies were classified and analyzed by applying the SPSS 29.0 program by dividing them in the order of year of publication, research topic, research field, research subject, and research method. First, in terms of the publication year, most research appeared from 2013 to 2022(99 studies, 48.8%). Second, regarding research topics, cheerleading appeared the most, with 23 studies in Korea and 141 in the USA appearing more than six times. Third, in terms of research fields, the field of sports medicine(54 studies, 26.6%) appeared with the highest frequency, and in comparison, the area of sports medicine(8 studies, 3.9%) is very encouraging. Fourth, in terms of subjects of research, studies on athletes(127 studies, 62.6%) appeared the most, and studies on coaches(3 studies, 1.5%) were markedly lacking. Fifth, in terms of research methods, quantitative research (131 studies, 64.5%) was the most active, and qualitative research (71 studies, 35.0%) was only half of quantitative research. The above research results will suggest the future direction of cheerleading in Korea and be used as a basis for academic development.
Key Words
치어리딩, 스포츠, 한국, 미국, 연구동향, Cheerleading, Sports, Republic of Korea, United States of America, Research trends
A Study on the Perception of Taekwondo Demonstration Using Text Mining Analysis: Focusing on Competition Videos Participating in American TV Programs 텍스트마이닝 분석을 통한 태권도 시범 인식 연구: 미국 TV프로그램에 참가한 경연 영상을 중심으로
A Study on the Perception of Taekwondo Demonstration Using Text Mining Analysis: Focusing on Competition Videos Participating in American TV Programs 텍스트마이닝 분석을 통한 태권도 시범 인식 연구: 미국 TV프로그램에 참가한 경연 영상을 중심으로
이미연 Lee¸ Miyeon
DOI:10.23949/kjpe.2023.7.62.4.20
Abstract
This study analyzed 20,361 comments on the audition videos of the WT demonstration team in America’s Got Talent using text mining analysis and topic modeling analysis to understand the current perception of Taekwondo demonstrations. The results are as follows: First, through keyword analysis, the most frequently mentioned words were ‘amazing’, ‘golden buzzer’, ‘performance’, ‘deserve’, ‘love’, ‘performer’, ‘winner’, ‘best’, ‘show’ and ‘action’. These words mostly represent the emotions and impressions felt while watching the audition videos of Taekwondo demonstrations. By applying centrality and N-gram analysis, the keyword with the highest centrality, “golden buzzer”, was connected to keywords such as “deserve,” “impressive”, “give”, “medal”, “impact”, and “worthy”. This suggests a reaction to the WT demonstration team receiving the golden buzzer, interpreted as expressions of agreement. The keyword with high centrality, “performance”, was connected to keywords such as “amazing”, “great”, “best”, and “deserve”. This indicates a high level of satisfaction with the Taekwondo demonstration by the WT team, reflecting the ultimate expression of satisfaction. Secondly, the analysis of the comment topics using topic modeling revealed the presence of five distinct topics. Further examination of the distribution of comment topics and reanalysis of similar topics led to the identification of two predominant types of reactions in the comments: ‘The martial arts action using the board is an amazing performance and deserves the golden buzzer’ and ‘The amazing winner who cries for peace of the competition received immense respect for their outstanding performance’. The results of this study provide evidence of the possibility and positive effects of Taekwondo demonstrations gaining worldwide recognition. Moreover, it is particularly meaningful as it serves as an opportunity to validate the value of Taekwondo demonstrations as online content.
Key Words
태권도, 태권도 시범, 텍스트 마이닝, 아메리카 갓 탤런트, Taekwondo, Taekwondo demonstration, Text mining, America’s Got Talent
Relationship Between Content Attributes of Sports Entertainment Programs, Flow Experience and Sport Participation Intention 스포츠 예능 프로그램 콘텐츠 속성과 플로우(Flow) 경험 및 스포츠 참여의도와의 관계
Relationship Between Content Attributes of Sports Entertainment Programs, Flow Experience and Sport Participation Intention 스포츠 예능 프로그램 콘텐츠 속성과 플로우(Flow) 경험 및 스포츠 참여의도와의 관계
김현정 Kim¸ Hyun-jung
DOI:10.23949/kjpe.2023.7.62.4.21
Abstract
The objective of this study is to verify the relationship between content attributes of sports entertainment programs, flow experience, and sport participation intention. Total 231 questionnaires of data were collected by conducting an online survey through Kakao Talk's open chatting room related to sports entertainment programs or fan of cast members that have been aired on TV for the past three years. Among them, there were 207 usable valid samples, excluding 24 invalid samples. The collected data was statistically analyzed by using the SPSS 26.0 and AMOS 26.0, and the results are as follows. First, the entertainment of among sub-factors of content attribute did not have effects on the enjoyment, attention and time distortion, the sub-factors of flow experience. Second, the Reliability of among sub-factors of content attribute had positive effects on the enjoyment, attention and time distortion, the sub-factors of flow experience. Third, the informativeness of among sub-factors of content attribute had negative effects on the enjoyment, attention and time distortion, the sub-factors of flow experience. Fourth, the enjoyment of among sub-factors of flow experience had positive effects on sport participation intention. The attention and time distortion did not have effects on sport participation intention.
Key Words
스포츠 예능, 스포츠 예능 프로그램, 콘텐츠 속성, 플로우, 스포츠 참여의도, Sport entertainment, Sport entertainment program, Content attribute, Flow experience, Sport participation intention
Effects of the Physical Activity Intervention Enhancing Fundamental Motor Skills on the Development of Visual Perceptions in Preschoolers 기본운동기술 중심의 신체활동이 유아의 시지각 발달에 미치는 효과
김범철 Bumcheol Kim , 김설향 Seolhyang Kim , 진주연 Jooyeon Jin
Effects of the Physical Activity Intervention Enhancing Fundamental Motor Skills on the Development of Visual Perceptions in Preschoolers 기본운동기술 중심의 신체활동이 유아의 시지각 발달에 미치는 효과
김범철 Bumcheol Kim , 김설향 Seolhyang Kim , 진주연 Jooyeon Jin
DOI:10.23949/kjpe.2023.7.62.4.22
Abstract
The purpose of this study was to examine effects of the physical activity intervention enhancing fundamental motor skills on the visual perceptions in preschoolers. Research participants were assigned into two groups, experimental group (n=10) and control (n=10). The intervention was administered twice a week during 12 weeks. The study results are as follows: 1) the intervention had a positive effect on the development of GVP. A pre- and post-analyses showed the improvement with an increase in average test scores (94.1±15.8 to 111.6±17.8). Two-way ANOVA also revealed statistically significant interaction effect (F=7.99, p<.001). 2) The intervention had a positive effect on the development of MRP. A pre- and post-analyses demonstrated improvement with an increase in average test scores (102.8±17.8 to 121.4±14.8) and two-way ANOVA also showed statistically significant interaction effect (F=7.36, p=.014). 3) The intervention program had a positive effect on development of VMI. A pre- and post-analyses showed the improvement with an increase in average test scores (85.9±24.6 to 100.7±20.2) and two-way ANOVA demonstrated that the interaction effect is statistically significant (F=10.75, p=.004). The results of this study may suggest that the physical activity program based on fundamental motor skills can be used to effectively promote development of visual perceptions in preschoolers.
Key Words
유아기, 기본운동기술, 신체활동, 시지각, 운동발달, 지각운동, Fundamental motor skills, Physical activity, Visual perception, Motor development, Perception training
The Relationship between Personal Trainer's Interpersonal Style and Participants' Intend to Continue Exercise : the Mediating Effect of Achievement Goal Orientation 퍼스널 트레이너의 상호소통방식과 참가자의 운동지속의도 간의 관계: 성취목표 성향의 매개효과
The Relationship between Personal Trainer's Interpersonal Style and Participants' Intend to Continue Exercise : the Mediating Effect of Achievement Goal Orientation 퍼스널 트레이너의 상호소통방식과 참가자의 운동지속의도 간의 관계: 성취목표 성향의 매개효과
주우영 Joo¸ Woo-young , 유지은 Yu¸ Ji-eun
DOI:10.23949/kjpe.2023.7.62.4.23
Abstract
The purpose of this study was to examine the mediating effect of achievement goal orientation on the relationship between personal trainers' interpersonal Communication Styles (autonomy supportive vs. controlling) and participants' exercise continuance intention. An online survey was conducted with 251 participants with personal training experience in fitness centers located in Seoul, Gyeonggi, and Gangwon provinces. The collected data were subjected to frequency analysis, descriptive statistics, confirmatory factor analysis, reliability analysis, correlation analysis, and PROCESS Macro analysis using SPSS and AMOS statistical programs. The results showed that, first, autonomy-supportive communication style had a positive effect on task orientation and ego orientation, while controlling communication style had a positive effect only on ego orientation. Second, autonomy-supportive communication style had a positive effect on exercise continuance intention, while controlling communication style had a negative effect. Third, task orientation positively mediated the relationship between autonomy-supportive communication style and exercise continuance intention, while ego orientation had no mediating effect. In addition, neither task orientation nor ego orientation mediated the relationship between controlling communication style and exercise continuance intention. The findings that autonomy-supportive communication style and task orientation influence exercise persistence in personal training may provide useful information for personal training where interaction is important.
Key Words
퍼스널 트레이닝, 상호소통방식, 운동지속의도, 성취목표, Personal training, Interpersonal communication styles, Exercise continuance, Achievement goal
The Application of Machine Learning Algorithms to Predict English Premier League Match Results 영국 프리미어리그 경기데이터 기반 머신러닝을 활용한 경기결과 예측 및 분류모형의 예측 성능 비교
김필수 Kim¸ Philsoo , 전성삼 Jeon¸ Seong Sam , 이상현 Lee¸ Sang Hyun
The Application of Machine Learning Algorithms to Predict English Premier League Match Results 영국 프리미어리그 경기데이터 기반 머신러닝을 활용한 경기결과 예측 및 분류모형의 예측 성능 비교
김필수 Kim¸ Philsoo , 전성삼 Jeon¸ Seong Sam , 이상현 Lee¸ Sang Hyun
DOI:10.23949/kjpe.2023.7.62.4.24
Abstract
The accumulation and collection of big data related to sports along with the development of AI algorithms, and computer science has opened a new era of research on the prediction of sports match results based on machine learning. Football, which has the largest market in the world, calls for such research still in its early stages of academic development and practical needs. This study was conducted to predict the English Premier League match to expand machine learning application in sports result prediction research. To implement our research idea, game match variables were collected from various validated sites such as Premier League, Fotmob, Trasfer market, and Capology homepage through web scraping technique. Following the procedure, 16 variables were selected for the research modelling optimized based on a stepwise selection of a total of 123 variables for 1,107 match data (N=2,214) during the 2020-2021 season to May of the 2022-2023 season collected to predict game results based on nine machine learning algorithms. As a result of the analysis, the prediction performance can be depicted in the order of Multi-layer Perception, Multinomial Logistic Regression, Linear Discriminant Analysis, Quadratic Discriminant Analysis, Support Vector Machine, Gradient Boosting, Ada Boost, Light-GBM, and Random Forest. The Multi-layer Perception, which showed the highest prediction performance, recorded an F1 score of 86.66. This study has made a significant theoretical and practical contribution to the development of game prediction with the application of machine learning algorithms in the domain of professional football, as it has significantly improved the prediction performance of previous studies recording a F1-score of 86.66 that includes expected goal (xG) variable not frequently applied in the prediction of game results in previous studies.
Key Words
머신러닝, 스포츠 애널리틱스, 빅데이터 분석, 축구 경기결과 예측, 영국 프리미어리그, Machine learning, Sports analytics, Big data analysis, Result prediction, English Premier League
50 Years after the 1966 Toledo World Amateur Wrestling Championship, the Process of Meeting Gold Medalist Jang Chang-sun and Silver Medalist Katsumura Yasuo 1966년 털리도 세계레슬링선수권대회 50년 후, 금메달리스트 장창선과 은메달리스트 가쓰무라 야쓰오와의 만남 과정
50 Years after the 1966 Toledo World Amateur Wrestling Championship, the Process of Meeting Gold Medalist Jang Chang-sun and Silver Medalist Katsumura Yasuo 1966년 털리도 세계레슬링선수권대회 50년 후, 금메달리스트 장창선과 은메달리스트 가쓰무라 야쓰오와의 만남 과정
최덕묵 Choi¸ Duk-mook
DOI:10.23949/kjpe.2023.7.62.4.25
Abstract
The purpose of this study is to shed light on the meeting process between gold medalist Jang Chang-sun and silver medalist Katsumura Yasuo, 50 years after the 1966 Toledo World Amateur Wrestling Championship. As a research participant, Jang Yu-jin, the eldest son of Jang Chang-sun, was selected and the data were collected through in-depth interviews and documents. The themes were derived from the collected data using an inductive analysis method. As a result of this study, first, Jang Chang-sun won the gold medal at the Toledo World Amateur Wrestling Championship in 1966, and Katsumura Yasuo of Japan won the silver medal. The two athletes met fatefully, but they stepped off the podium and returned to their countries without a word. Second, Katsumura Yasuo came to respect Jang Chang-sun over time and made an effort to find him to celebrate the 50th anniversary of his gold medal. Third, Jang Chang-sun and Katsumura Yasuo visited Korea on October 20, 2017 and met Jang Chang-sun after 50 years. The two greeted each other warmly and prayed for each other's health while celebrating the 50th anniversary. This thrilling sight has great historical, social, and educational implications to the extent that it serves as a model for the people and athletes. Jang Chang-sun is a sports hero recognized by Korea, and Katsumura Yasuo is also a sports hero in Japan.
Key Words
장창선, 가쓰무라 야쓰오, 스포츠영웅, 1966년 털리도 세계레슬링선수권대회, Jang Chang-sun, Katsumura Yasuo, Sport hero, 1966 Toledo World Wrestling Championship
Verification of the Structural Relationship among Motivational Climate, Fear of Failure, and Exercise Adherence Intention Perceived by Female Soccer Club Members 여자축구동호인이 지각하는 동기분위기, 실패공포, 운동지속의도 간의 구조관계 검증
Verification of the Structural Relationship among Motivational Climate, Fear of Failure, and Exercise Adherence Intention Perceived by Female Soccer Club Members 여자축구동호인이 지각하는 동기분위기, 실패공포, 운동지속의도 간의 구조관계 검증
The purpose of this study was to examine the effect of the motivational climate(mastery/performance) perceived by women's soccer club members on fear of failure and exercise adherence intention. This study was a cross-sectional study that measured the mastery climate, performance climate, fear of failure, and exercise adherence intention for participants. A total of 293 data were utilized for data analysis process, and descriptive statistics, reliability analysis, correlation analysis, confirmatory factor analysis, and structural equation model analysis using SPSS 26.0 and AMOS 26.0 program. The results indicated that the perception of the mastery climate had a direct positive effect on the exercise adherence intention, and also lowers the level of fear of failure, which had a positive effect on the exercise adherence intention. While, the perception of the performance climate increases the level of fear of failure, which negatively affected the exercise adherence intention. The results of this study suggest that the level of fear of failure may vary depending on the type of motivational climate, which may also affect the exercise adherence intention. Also, this study implied the role of coaches as a method for participants in women's soccer clubs to continue to participate in sports.
Key Words
동기분위기, 실패공포, 운동지속의도, 여자축구동호인, Motivational climate, Fear of failure, Exercise adherence intention, Female soccer club member
A Study on the Price, Satisfaction, and Loyalty of Leisure Activities 여가활동의 가격·만족·충성도에 관한 연구
A Study on the Price, Satisfaction, and Loyalty of Leisure Activities 여가활동의 가격·만족·충성도에 관한 연구
한지훈 Han¸ Jee Hoon
DOI:10.23949/kjpe.2023.7.62.4.27
Abstract
The purpose of this study is to analyze the price perception, satisfaction, and loyalty of leisure activities of leisure participants. Therefore, leisure participants were selected as subjects and 311 samples were collected online from May 3rd to May 6th, 2022. Data were analyzed using statistical programs (SPSS, AMOS). As a result of the study, Hypothesis 1: The price perception of leisure activities by leisure participants was suggested to have a positive effect on customer satisfaction. Hypothesis 2: Customer satisfaction with leisure activities of leisure participants was suggested to have a positive effect on customer loyalty. Hypothesis 3: It was suggested that the price perception of leisure activities by leisure participants does not affect customer loyalty. In conclusion, it was found that price in the leisure activities of leisure participants presented satisfactory results and had an indirect effect on loyalty through satisfaction.
The Effect of the Perceived Caring Atmosphere of Middle School Students Participating in School Sports Clubs on Learning Interest and Sports Confidence 학교스포츠클럽 참여 중학생의 인지된 케어링 분위기가 학습 흥미 및 스포츠 자신감에 미치는 영향
The Effect of the Perceived Caring Atmosphere of Middle School Students Participating in School Sports Clubs on Learning Interest and Sports Confidence 학교스포츠클럽 참여 중학생의 인지된 케어링 분위기가 학습 흥미 및 스포츠 자신감에 미치는 영향
The purpose of this study was to examine the effect of perceived caring atmosphere on learning interest and sports confidence of middle school students participating in school sports clubs. In order to achieve this purpose, 424 middle school students participating in school sports clubs in Busan were selected as samples using convenience sampling, and 367 of them were used as final effective samples, excluding 57 that are considered unfaithful responses. Using the SPSS 25.0 statistics program, exploratory factor analysis and reliability analysis were used to check the validity and reliability of the questionnaire. Furthermore, simple regression, and multiple regression analysis were used to identify differences in demographic characteristics. The results were as follows. First, the perceived caring atmosphere of middle school students participating in school sports clubs has indicated that they have a positive effect on learning interest. Second, the perceived caring atmosphere of middle school students participating in school sports clubs has positively affected sports confidence. Third, the interest of middle school students participating in school sports clubs has found out that they have a positive effect on sports confidence in part. The analysis of these results the caring atmosphere recognized by middle school students participating in school sports clubs can improve interest in learning and confidence in sports, and teachers or leaders will be able to think about creating a classroom environment.
Key Words
학교스포츠클럽, 케어링 분위기, 학습 흥미, 스포츠 자신감, school sports club, caring atmosphere, interest in learning, sports confidence
The Analysis on a Change in Physical Activity, Social Participation and Mental Health of Elderly People Due to COVID-19 COVID-19로 인한 노인의 신체활동, 사회참여 및 정신건강 변화 분석
한승아 Han¸ Seung Ah , 김민준 Kim¸ Min Jun , 감현준 Gam¸ Hyun Jun , 박현미 Park¸ Hyun Mi , 김도희 Kim¸ Do Hee , 허웅 Heo¸ Ung , 이정훈 Lee¸ Jung Hoon , 오태웅 Oh¸ Tae Woong
The Analysis on a Change in Physical Activity, Social Participation and Mental Health of Elderly People Due to COVID-19 COVID-19로 인한 노인의 신체활동, 사회참여 및 정신건강 변화 분석
한승아 Han¸ Seung Ah , 김민준 Kim¸ Min Jun , 감현준 Gam¸ Hyun Jun , 박현미 Park¸ Hyun Mi , 김도희 Kim¸ Do Hee , 허웅 Heo¸ Ung , 이정훈 Lee¸ Jung Hoon , 오태웅 Oh¸ Tae Woong
DOI:10.23949/kjpe.2023.7.62.4.29
Abstract
The purpose of this study is to figure out a change in physical activity, social participation and mental health of the elderly caused by COVID-19 and to look into which influence this change has upon mental health of old people. Targeting 184 senior citizens aged 65 or older who are dwelling in Y city of Gyeonggi Province, who have no problem with cognitive function, and who are free to communicate, the offline questionnaire survey was conducted over a total of three months from August of 2022 to October. To examine a change due to COVID-19, the Paired samples T-test was carried out. To verify the relative influence among physical activity, social participation and mental health of the elderly, the correlation analysis was implemented. According to the research results, first, elderly people’s physical activity, social participation and mental health caused by COVID-19 appeared to have a statistically significant difference(p<.001). Second, the correlation was indicated to be r=0.302, p=.000 between physical activity and mental health and to be r=0.147, p=.046 between social participation and mental health. Thus, there was a low positive(+) correlation.
Key Words
COVID-19, 노인, 신체활동, 사회참여, 정신건강, Elderly people, Physical activity, Social participation, Mental health
Static Activity Recognition based on Electrocardiogram Signals using Deep Neural Network 심층 신경망을 활용한 심전도 신호 기반 정적 행동 인식
윤석호 Yun¸ Seok Ho , 서혜진 Seo¸ Hye Jin , 유제광 Ryu¸ Jeh Kwang
Static Activity Recognition based on Electrocardiogram Signals using Deep Neural Network 심층 신경망을 활용한 심전도 신호 기반 정적 행동 인식
윤석호 Yun¸ Seok Ho , 서혜진 Seo¸ Hye Jin , 유제광 Ryu¸ Jeh Kwang
DOI:10.23949/kjpe.2023.7.62.4.30
Abstract
This study focuses on the classification of human static activities using a single wearable electrocardiogram(ECG) sensor. Four static activities(lying, sitting, standing, and squatting) were defined for the classification task. A wearable ECG sensor was attached to the V2 position of participants for data collection. The ten participants performed the defined static activities in a random order during the experiment. Deep neural network- based models, specifically a one- dimensional convolutional neural network(1D CNN) and hybrid models combining 1D CNN with a long- short term memory(LSTM) or gated recurrent unit(GRU) layers, were utilized for classification. Comparing the classification performance of the models, the 1D CNN- GRU hybrid model achieved the highest test accuracy(f1- score) of 91.45%(91.48%), representing a improvement over the 1D CNN model and 1D CNN- LSTM hybrid model. Additionally, the t- SNE results demonstrated a more clustered distribution with the hybrid models. In conclusion, improved classification accuracy and more distinct data distribution patterns indicate the effectiveness of the hybrid model in accurately identifying static activities. Therefore, the proposed hybrid model in this study enhances the potential for nonintrusive and user- friendly activity recognition.
Key Words
인간 행동 인식, 심층 신경망, 심전도, 웨어러블 장비, 패턴 인식, Human activity recognition, Deep neural network, Electrocardiogram, Wearable device, Pattern recognition
Biomechanical Investigation on Excessive Medial knee Displacement (MKD) with Increasing Squat Weight for Elite Weight Lifters 숙련자의 스쿼트 중량 증가에 따라 나타나는 무릎 안쪽 움직임에 대한 운동역학적 연구
Biomechanical Investigation on Excessive Medial knee Displacement (MKD) with Increasing Squat Weight for Elite Weight Lifters 숙련자의 스쿼트 중량 증가에 따라 나타나는 무릎 안쪽 움직임에 대한 운동역학적 연구
The purpose of this study was to examine the hip abduction-adduction muscle strength ratio and muscle activation for medial knee displacement (MKD), in which the central point of the patella moves inwardly, crossing over the great toe during the transition from the descending section to the ascending section when skilled participants perform full squats with heavy loads. For this study, participants were divided into an MKD group (n=10) and a non-MKD group (n=10). As for the experimental method, muscle activity of the adductor magnus was measured using surface electromyography, and joint motion was analyzed using a 3-dimensional motion analysis system while increasing the squat loads by 10% from 40 to 90% of 1RM. after motion analysis, the ratio of hip abduction-adduction muscle strength was measured using a dynamometer. As a result of the study, the MKD group showed medial knee displacement as the loads increased. There was a significant difference in the hip abduction-adduction muscle strength ratio between the MKD group and the non-MKD group. The non-MKD group showed greater muscle activity in the adductor magnus and gluteus medius than The MKD group. In conclusion, MKD is possibly due to the abduction-adduction muscle strength ratio, not by the abduction-adduction muscle strength weakness, and to the inability to increase muscle activity of the abduction-adduction muscles together as the loads increases.
Key Words
스쿼트, 무릎 안쪽 움직임, 관절운동학, 근활성도, 트레이닝, Squat, Medial knee displacement, MKD, Joint kinematics, Muscle activation, Training
