Purpose The purpose of this study was to investigate the three dimensional joint angles of the ankle, knee and hip during basic long turn, carving long turn, basic short turn and carving short turn. Methods Fourteen alpine ski instructors from Korea Ski Instructor Association participated in this study. Each skier asked to perform 4-types of turning technique, classified by radius and level. 8 inertial measurement units were used to measure three-dimensional joint angles of the ankle, knee and hip joint. Results Significant differences were found the lower extremity joint angles on the mediolateral and vertical axis during long-turn and carving-turn (p<.05). significant differences were found the lower extremity joint angles on the anteroposterior axis in the steering phases 1, 2 and complete phase (p<.05). Conclusions In the Alpine skiing, the short turn requires a complex movement of the lower limb joint compared to the long turn. When performing a long turn, the movement of the ankle joint on the vertical axis are required compared to the short turn. And the carving and short turn need to the movements of the lower limb joint on the mediolateral axis.
PURPOSE This study aimed to prove the mediator effect of skill level on participation frequency and injury level of leisure sports players with the highest injury rate. METHODS Raw data of the “2019 Sports Safety accident data” conducted by the Korea Sports Safety Foundation were used for this study. We analyzed 857 leisure sports players participating in events with the top four highest injury rates (Basketball, Soccer, Baseball/Softball, Foot Volleyball). Frequency, descriptive statistics, and correlation analyses using SPSS version 27.0 and Process macro model 4 were employed for analysis. RESULTS The results regarding participation frequency, injury severity, and skill level among recreational athletes are as follows. First, a positive correlation was established between the participation frequency of recreational athletes and their skill levels. Second, the correlation between participation frequency and injury severity was observed only in soccer and basketball. Third, skill level plays a mediating role in the relationship between participation frequency and injury level. The results indicate that as the participation frequency among leisure sports players who participate in ball sports with a high injury rate increases, this affects the degree of injury. CONCLUSIONS Skill level appears to play a mediating role in the relationship between participation frequency and injury level. Based on the results, we recommend safety education not only on the relationship between participation frequency and injury level, but also the intermediary role of skill level.
PURPOSE This study investigated differences in gaze entropy according to skill level and temporal occlusion in table tennis serve reception. METHODS Study participants were divided into a skilled group (n = 6) and a novice group (n = 6). The study task involved sitting in front of a monitor while wearing an eye tracker, watching 36 serve videos, and predicting whether the ball’s length would be short or long by pressing the "Top" (short serve) or "Bottom" (long serve) pad on the selection response pad. RESULTS Overall, the later the temporal occlusion level, the faster the reaction time and the higher the judgment accuracy. At temporal occlusion levels 2 and 3, skilled participants showed higher judgment accuracy than novices. Analysis of heatmap and gaze entropy revealed that novices exhibited visual search toward the ball across all temporal occlusion levels (T1, T2, T3) and had high gaze entropy. In contrast, skilled participants generally showed visual search to the racket area depending on the temporal occlusion level, with low gaze entropy at T1 and T2, and a tendency for increased gaze entropy at T3. CONCLUSIONS Compared to novices, skilled participants had lower gaze entropy and fixated more on the racket area when predicting table tennis serves. Similarly, novices focused more on the ball than on the racket. The study also proposed the value of using heatmap and Shannon entropy for this type of analysis.
Purpose The purpose of this study is to overcome the shortcomings of 109C(Forward 4 ½ somersault) skill(Level 3.7) for two members of the men’s national diving team(YHR, KYN). Methods For qualitative analysis of the performed skill, three high-speed cameras and water-attached EMGs consisting of a total of ten placements were used. We instructed the two players to perform single-leg jump and double-leg jumps a total of three times each. Results The results of this study indicate that YHR and KYN appeared to increase their time or maintain the same time compared to the previous phase and displacement appeared higher when skill success occurred after the double-leg jump. The Shoulder & hip joints of YHR, KYN appeared larger in E2 and the hip joint of KYN appeared to increase in E1. Single-leg jump appeared similar or decreased the performed time of the previous phase in the last P5. YHR appeared larger only at a hip joint angle and KYN appeared smaller at the hip joint. The muscle activity(iEMG) of the two players appeared greater during skill failure than most of the muscles. Conclusions When perfectly performing 109C skills, the acquisition of medals in international competitions is possible. Therefore, in the future, it is necessary to study all of the variables that pertain to 109C.
The purpose of this study was to examine the effects of happiness improvement program on psychological variables which were happiness feeling, self-esteem, interpersonal relationship, internal-external locus of control, stress, coping, perceived performance and physiological variables such as cortisol and serotonin of collegiate badminton players. The participants consisted of 10 collegiate badminton players. Happiness improvement program for collegiate badminton players was developed by previous literatures, in-depth-interview, psychological test data, and consultation of happiness improvement experts. The happiness improvement program consisted of 12 intervention program: orientation, rapport development and the understanding happiness, self-esteem enhancement techniques, interpersonal relationship strategies, stress and coping management, peak performance methods, and action plan of happiness improvement program. Each program was applied to participants in about 90-120 minute a session(2-3 times session a week). The instruments of this study were made up of three broad categories: (a) psychological data, b) physiological data, and (c) qualitative data. Firstly, happiness improvement program significantly increased happiness feeling, self-esteem, internal-external locus of control, interpersonal relationship capability, coping skills of collegiate badminton players. Secondly, happiness improvement program significantly decreased stress of collegiate badminton players. Thirdly, participants positively perceived the effects of happiness improvement program on psycho-physiological variables. The limitations of this study and future implications were discussed.
Purpose The purpose of this study was to compare the official world records of UIPM in the last 3 years to find out the relationship between the score characteristics of fencing, swimming, equestrian, and laser-run events in the final rankings and to analyze the relative importance of each event. Methods For 3 years, from 2017 to 2019, a total of the data were collected, the final rankings, fencing conversion scores, swimming conversion scores, equestrian scores, and laser-run conversion scores for all male and female athletes who participated in the UIPM Level 1 World Cup and World Championships(1,197 finals and 2,173 qualifiers). The Multiple regression analysis was used to establish the relationship between the response(subjective) variable and the conversion score of the four explanatory(independent) variables. Results The results were compared by qualification (n = 2173) and final (n = 1197) by dividing into male (n = 1179) and female (n = 1591), and the fencing score was qualifications (male β= -.691, female β= -.533) and the finals (male β= -.632, female β= -.632), it showed the greatest influence in all. On the other hand, the swim score showed the lowest impact on both qualifications (male β=-. 021, female β=-.196) and finals (male β=-. 087, female β=-. 207). The fencing event plays a major role in passing the qualifiers and is a big variable for good performance in the finals. On the other hand, in the case of swimming scores, both men and women had the lowest impact on the final ranking, and there is a limit to the final performance of swimming scores in both qualifiers. Conclusion In conclusion, it is necessary to analyze and systemize the fencing skills of the world’s best athletes, including Korean athletes, to improve the Korean fencing athletes' performance, and through such scientific analysis, a system that enables fast and flexible responses to the upcoming Olympic. Additionally, even though the importance of all sports should be levelled due to the characteristics of modern pentathlon, relative importance is biased toward fencing and swimming events are neglected. Therefore, it is deemed necessary to conduct a follow-up study on whether the scoring system in modern pentathlon consists of a scoring system that supports the records of each event and the upper and lower scoring system.
Purpose This study was to investigate the effect of various motor leaning techniques which were applied on the youth soccer training program. Methods 12 elementary soccer players and the director of R youth soccer team have participated in the study. The expertise level of youth soccer team were ranged from beginner to advance. To investigate the effect of new soccer training program we adopted a methodology of action research. We first analyzed the problems of original youth soccer program and reconstructed the training program considering of individualized characteristics. The 3 main problems of original soccer program (1. feedback provisions 2. difficulty of task level 3. time distribution of training) have been reconstructed by four motor learning experts. For the data analysis, several qualitative analyze techniques were conducted to observe player’s improvements. Results First, participants had a better understanding on proper motion of shooting and lifting skills from the guidance techniques. Second, utilizing the personal skills and team cohesion have been improved by the modified rules and space competition. Third, the ability of active problem solving have been improved from the self-learning environment. Forth, the player’s confidence level have been improved by eliminating performance outcome. Conclusions From the aspects of variety circumstances in sport education field, the comprehensive motor learning program should be developed and applied.
Purpose This study was designed to develop a curriculum for pre-service golf coaches at universities to enhance the coaches’ competencies to counsel athletes on the field. Methods This study was conducted in accordance with the revised and supplemented procedures for the national competency standard (NCS) based curriculum development outline under the level of application of individual instruction-level classes among the types of curriculum development. Results The results were as follows: First, the elements of the counseling competence were guided by conflict resolution counseling, psychological skills training, guidance counseling, coordination and Intervention, and relationship formation. Second, the curriculum was adopted as a curriculum for sports psychology, theory and practice of counseling, counseling practice and super-vision, and psychological skills training, and non-disciplinary activities were participation in group and personal counseling, and an open counseling case study. Third, the feasibility of the curriculum was calculated in the range of 0.8 to 1.0 for all areas to be reasonable. Conclusions The results of this study have structured the counseling competencies required for pre-service golf coaches. Based on this, the results of the study suggest counseling courses in the curriculum of university. This is expected to ultimately seek to improve the coaching field by enhancing the capacity of the coaches.
The purpose of this study was to investigate the level of factors associated with points and the difference among weight categories after the revision of wrestling competition rules from video images. Factors associated with points were average point per a game, average points according to playing type, the occurring frequency of point according to the skills, the frequency and successful ratio of Parter, and the time zone of points occurred. The video contents were concerned on athletes ranked in 1 - 5 (6 person) at 59, 66, 75 Kg categories of Greco-Roman style in the 2014, 2015 World Wrestling Championship. The analysis was done by watching TV monitor several times. Five quantitative factors were tested between weight categories. As the results, no significant difference was found in average obtained point, but significant difference was found in average lost point (p<.05). Average obtained point showed significant difference in cross effect of the type of game and weight category. And average lost point showed significant difference in the type of game (p<.01) and weight category (p<.05), too. The frequency of point by skills of stand and ground wrestling showed significant difference in weight category (p<.001). However, no significant difference was found in frequency of point by time zone among weight categories. In conclusion, the point obtained and lost and the frequency of it are associated with the type of game and skills included in it of Greco-Roman style wrestling. New training program focused on enforcing the correct type of game and skills in it might be useful for developing the performance.
Purpose The purpose of this study was to examine students’ perceptions of girls’ participation in physical education(PE) in elementary schools and examine the impacts of a girl-friendly integrated program on children’s participation in PE classes. Methods The participants were 10 fifth graders (5 girls and 5 boys) and their teacher in an elementary school. Data which were collected from in-depth interviews with students, students’ journal entries, field observation, and teacher’s reflective journal entries were analyzed inductively. Results Findings revealed that boys perceived girls’ participation as passive, possessing a low level of skills, and staying at the peripheral position. Meanwhile girls expressed their desire to demonstrate their strengths in PE classes and were afraid of boys’ criticism regarding their lack of skills. There were also misconceptions and misunderstanding on girls’ PE participation between boys and girls. In order to resolve these issues, a girls-friendly integrative program was designed. based on the four guiding principles drawn from students’ perception: (1) from ignorance to interest, (2) from misunderstanding to understanding, (3) from sport skills to sport values, and (4) from competition to cooperation. The program integrated boys and girls for promoting active interaction and also integrated competence, knowledge, and dispositions to accommodate students’ various ways of PE participation. Findings revealed that the program had: (1) diversified students’ perceptions of PE participation, (2) promoted students’ diverse and active participation, and (3) established classroom atmosphere which emphasized positive values.
