PURPOSE This study theoretically explains the relationship between Keirin players’ core competencies and their performances. It also analyzes the impact of interaction between objectively identifiable core competencies and players’ efficiency toward their results, that is, the ability to convert their resources into performance. METHODS Using Python 3.11.1, 20,185 race records were collected of cyclists who competed at Gwangmyeong Velodrome in 2022 and 2023, and player efficiency was estimated using the R 4.3.1 package. Subsequently, the impact of players’ physical abilities (200 m records) on performance and player efficiency’s influence on the relationship between physical ability and performance were analyzed using Model 1 of PROCESS 4.1 Macro installed in SPSS 26.0. RESULTS First, players’ physical ability had a statistically significant impact on their performance. Specifically, the 200 m record significantly influenced the likelihood of finishing in the top 1 (coef = –.68 , p<.01 ), top 2 (coef = –.56, p<.01), and top 3 (coef = –.46, p<.01). Second, player efficiency moderated the relationship between players’ 200 m record and the likelihood of finishing within the top ranks. Specifically, the interaction term’s influence was empirically demonstrated between 200 m records and player efficiency on the likelihood of finishing within the top 1 (coef = –.47, p<.05), top 2 (coef = –.28, p<.05), and top 3 (coef = –.28, p<.05) for players with similar speeds, in that it significantly increased. CONCLUSIONS This study pioneers research that explains the relationship between players’ key competencies and performance based on resource-based theory, and it empirically demonstrates that player efficiency serves as a moderating variable in the relationship between key competencies and performance.
This paper analyze Korean baseball player's efficiency based on entire team and each team by using DEA (Data Envelopment Analysis) and use this efficiency to discuss effective way of recruiting players. Therefore, the purpose of this study was to evaluate each professional baseball team management efficiency through Data Envelopment Analysis. Player who were qualified free agent salary for the input variable and OPS and XR for output variable were used respectively then data were analyzed using Frontier Analyst 4.0. Also the recruiting factors of FA baseball player were confirmed by five baseball experts. we categorize the five factors of recruiting: age, durability, skill of improvement or decline, steady record, necessary position. The results were as follows. First, Han Sang-Hun and Lee Dae-Hyeong recorded the most efficient management among all professional baseball player. On the other hand, Choi showed inefficient management, followed by Park Han-Yi, Son Si-Heon, Lee Jong-wook, Jeong Keun-Woo, Lee Yong-Kyu, Lee Dae-Soo, Kang Min-Ho, Lee Byeong-Kyu.
Professional volleyball league, which was launched and its popularity was steadily increased since 2005, has suffered from difficulties in its operation due to deficits after 2013. In addition, each professional volleyball team has worked out for parent company so far as a means of advertisement but does not look like effective management. Therefore, the purpose of this study was to evaluate each professional female and male volleyball team management efficiency through Data Envelopment Analysis. Player salary for the input variable and points and the number of spectators for output variable were used respectively then data were analyzed using Frontier Analyst 4.0. The results were as follows. First, Hyndai capital and Rush & Cash recorded the most efficient management among all professional male volleyball team. On the other hand, Samsung showed inefficient management, followed by LIG, KEPCO, Woori Card, and Korean Air. Second, GS Caltex and IBK were discovered as the highest management efficiency among all professional female volleyball team. On the contrary, KGC recorded inefficient management, followed by Korea Expressway Corporation, Hyundai Construction and Heungkuk life.
PURPOSE This study aims to develop a coach presenteeism scale with scientifically proven reliability and validity. METHODS In order to achieve the research purpose, preliminary questions were drafted using previous studies (Lee & Kim, 2022) and existing presentation questionnaires (SPS-34, SPS-6, SPS-13). The preliminary set of questions was composed of 23 questions, which were deliberated through a meeting with subject experts. After which, a survey involving 183 coaches was conducted. In this study, statistical verification procedures were conducted through construct validation, exploratory factor analysis, confirmatory factor analysis, internal consistency analysis, convergent validation and discriminant validation. RESULTS Finally, a 2-factor (DRA 5 items, DTP 5 items), 10-item coach presenteeism scale was developed. CONCLUSIONS In this study, a scale with verified reliability and validity was developed to support and investigate the presenteeism phenomenon experienced by coaches. These may be used by coaches themselves to check their presenteeism status and may guide future research to effectively train athletes.
Purpose The purpose of this study was to find out the physical characteristics of Wushu athletes by comparing the differences on the results of physical fitness between the male athletes of the Wushu national team Taolu and the Sanda group. Methods Measurement of basic and professional fitness based on muscle function, targeting 37 men Wushu national team players (24 taolu, 13 Sanda) in the selection and evaluation contests twice in 2018 and 2019. Body composition, isometric muscle strength, flexibility and equilibrium, anaerobic power, and isokinetic muscle strength. The fitness factors were divided into two groups, Taolu and Sanda. Results First, body fat rate of the Sanda athlete group was significantly lower than that of the taolu athlete group (p<.01). Second, in the isometric muscle strength category(back muscle strength, grip strength), the Sanda athlete group had higher muscle strength than Taolu athlete group, but there was a statistically significant difference only in the left grip strength (p<.01). Third, in terms of flexibility and equilibrium, the taolu players were significantly higher in all items(p<.001). Fourth, in the anaerobic power, the taolu athlete group had higher both the peak power and the mean power, and there were a significant differences(peak power: p<.01, mean power: p<.001). Fifth, isokinetic muscle strength was significantly higher in the right knee flexion of the taolu athlete group (p<.01), and lumbar extensor muscle was significantly higher in the Sanda athlete group (p<.05). Sixth, in the isokinetic strength ratio, the knee flexion ratio of the Sanda athlete group were significantly higher on the left and right knee flexion and extensor ratios (p<.05). In addition, in the lumbar flexor and extensor ratios, the group of Sanda athlete group were significantly higher on the lumbar extensor(p<.05). Seventh, there was no significant difference between two groups in isokinetic muscle power. Conclusions The results of this study can be used as basic data to improve the efficiency of technical and physical training through the analysis of the characteristics of Taolu and Sanda. The effectiveness of this training will help to improve the performance.
Purpose The purpose of this study was to determine the effectiveness of six-weeks intermittent hypoxic training at 3,000 m hypobaric hypoxic condition on aerobic and anaerobic exercise capacity in competitive swimmers. Methods South Korean swimmers (n=20) were randomly assigned into training at sea-level (n=10, intermittent normoxic training group; INT) and training at 526 torr corresponding to 3,000 m hypobaric hypoxic condition (n=10, intermittent hypoxic training group; IHT). The participants completed an aerobic continuous treadmill training (30 min) within 80%HRmax and anaerobic interval bicycle training (10 times; 2 min of exercise and 1 min of rest) for 30min within 90%HRmax in each environment. We compared their aerobic and anaerobic exercise capacity before and after six-weeks of training. Exercise frequency was 1 hour, 3 days per a week, and during 6 week. Results In aerobic exercise capacity, PWC at 75%HRmax, estimated VO2 max, and exercise time were increased by training in only the IHT group. Estimated VO2 at 75%HRmax was increased by training in both groups, but presented a larger increase tendency in the IHT group compared with the INT group. In anaerobic exercise capacity, peak anaerobic power and fatigue index were increased by training in only the IHT group. Blood lactate level after wingate test were decreased by training in both groups, but the IHT group have a lower blood lactate level in after training compared with the INT group. Conclusion In our study, we did not measure to various dependent variables for support to enhancement of aerobic and anaerobic exercise performance. However, these results showed that the IHT method may be effective in improvement of exercise performance in competitive swimmers who participates in a variety of events from short to long distance.
The purpose of this study was to investigate the effect of running economy and energy return in lower extremities according to the increase of bending stiffness of the shoes, furthermore to investigate the relationship between running economy and energy return for the improvement of sports performance. Subjects employed for this study were 10 healthy male college students who have not had the experiences in lower extremities injuries. Four different kinds of shoes in bending stiffness as with 0.56 N/mm, 0.74 N/mm, 0.96 N/mm, 1.21N/mm were used respectively. 3-D cinematography and pulmonary gas analyzer were utilized for energy return and energy consumption data during running according to the increase of bending stiffness of the shoes to obtain the following results. As the bending stiffness of running shoes increased, the statistical significance were not founded, however, the tendency of decrease in max. flexion moment and power, increase in max. extension moment and power in lower extremity joint were showed. Joints energy showed no statistical significance in phase 1, however, the tendency of lesser absorbtion as the bending stiffness of running shoes increased were showed. More energy were generated as the bending stiffness of running shoes increased in phase 2 with no statistical significance. Energy economy increased according to the increase of bending stiffness of running shoes. Negative correlation were showed between flexion moment of hip joint and energy consumption(p<0.05). Slightly higher degree of correlation between max. flexion power of hip and ankle joint and energy consumption were showed without statistical significance. Negative correlation were showed between joints energy and energy consumption for ankle joint in phase 1(p<0.05).
This study was to explore and confirm factors of sport psychology counseling needs in Korean elite coaches. In order to achieve this purpose, 56 elite coaches in Korean Olympic training center at Taereung and Jincheon responded on open-questionnaire and 260 coaches responded on survey. Open-ended questionnaire responses were analyzed by inductive content analysis and collected survey data were analyzed by exploratory factor analysis and confirmatory analysis. The results were as follows: Firstly, sport psychology counseling needs of elite coaches were competition preparation, negative athlete-coach relationship, athlete private problems, performance degradation, pressure on performance result, injury management, team cohesion degradation, motivation, training management, different gender athlete control, athletes drop out, pressure from outside, conflicts with colleagues, neglecting from athletes, feeling of incompetence, emotional control problem, and so on. Secondly, based on these responses, closed-ended questionnaire was developed, surveyed, and analyzed. Exploratory factor analysis illustrated that sports counseling needs of coaches were performance enhancement strategies, unreasonable pressure, negligence on training, coaching stress, competition result stress, conflicts with athletes. Finally, confirmatory factor analysis showed that construct of sport counseling needs illustrated appropriate fit indices values. The results of this study contributed to provide fundamental information on coaching education program and sport psychology counseling program development and application. Consequently, it will help coaches to control their mind at coaching in training and competitions.
Purpose The following study was conducted to suggest and verify the validity of the concept of team performance, which has previously been considered as the total sum of individual performances. Method The concept of team performance was extracted by a conductive content analysis and an exploratory factor analysis of the data gathered from middle school football players. To verify the validity of the extracted concept, football experts' opinions were collected. Results The idea of team performance, categorized by Footballship, Team Capability, Personal Capability, Communication among Members, has been taken differently from the total sum of individual performances. Footballship is the virtue that should be materialized, and simultaneously earned during the game. Team Capability is a available resource for team's performance, Personal Capability is a available resource for a player's performance, and Communication among Members is the intimacy of communication between coaches and players. The conglomeration of experts' opinions on the concept of team performance and its components shows that team performance is evidently different from the total sum of individual performances. Conclusion The following study has been conducted to suggest and verify the validity of the concept of team performance. Team performance exists, standing distinct from the sum of individual performance, and understanding the concept of team performance will contribute not only to understanding performance, but also to improve the effectiveness of training and managing the team. Interest of the sport society is looked forward to.
This study was designed to develop a communication training program for college ice hockey teams and examine the effects of this program. College ice hockey players and coaches participated in this study. The various types of data were collected and analyzed to assess the needs of the program and to develop the program with expert meetings. To analyze the effects of the developed program, questionnaires, experience reports, and in-depth interviews were conducted as measures. The results of this study are as follows. First, ice hockey team communication consisted of eight factors (i.e., sympathy, respect, trust, two-way verbal communication, firm expression of opinion, training program communication, developing rapport, and cohesion). Thus, the program developed based on eight factors and consisted of three stages of total 12 sessions which was 90 min to 100 min long. Second, this program increased communication satisfaction, coach-athlete interaction, group cohesion and exercise effectiveness, and these quantitative results were statistically significant. Moreover, qualitative analysis revealed that this program enhanced sympathy, social cohesion, and task cohesion among participants as well as positively changed their communication skills better than before. The communication training program which was developed through this study could provide basic information of a communication training program in the sports domain and positively influence overall sports team effectiveness and performance.
