[Purpose] This study aimed to examine the effects of complex physical training on exercise and football performances in youth football players. [Methods] The subjects (n=16) were randomly assigned to either a complex physical training group (CPG, n=8) or a control group (CON, n=8). CPG was performed the complex physical training for 50 minute per day, and 2∼3 times per week, for 8 weeks. Exercise performance (health related physical fitness, skill related physical fitness, Y-balance and functional movement screen; FMS) and football performance (juggling, speed dribbling, shot passing, long kick and triple hop) were measured before and after 8 weeks complex physical training. [Results] Sit-up (p=0.002), sit and reach (p=0.040), 50-m run (p=0.031), side step (p=0.005), single-leg standing with eyes closed (p=0.040), plank (p=0.023), dominant composite score (p=0.002) and non-dominant composite score (p=0.005), deep squat (p=0.009), inline lunge (p=0.042), active straight leg-raise (p=0.015), rotary stability (p=0.049), total score(p=0.001), speed dribbling (p=0.030), dominant triple hop (p=0.001) and non-dominant triple hop (p=0.032) were statistical significant interactions between group and time. [Conclusion] Our findings indicate that complex physical training has beneficial effects on performance improvement of exercise and football in youth football players.
This study aimed to explore the psychological factors affecting sports performance and their purposes as perceived by adolescent athletes. Study data were collected by conducting an open-ended survey with 232 student athletes from adolescent athletes in S city. The collected data were categorized using content analysis, which was conducted twice to explore the psychological factors affecting sports performance and their purposes. From 537 answers, 30 performance-affecting psychological factors—including confidence, endurance, effort/dedication, optimal tension, and social support—were identified, and they were classified into five categories: psychological fundamental, mental toughness, motivation, emotional stability, and social relationships. From 588 answers, the purposes of the psychological factors were identified, including performance achievement, motivation enhancement, demonstrating mental toughness, cognitive strategy, confidence increase, emotional regulation, injury prevention, game strategy, and reinforcement cohesion. These performance-affecting psychological factors and their purposes may serve as a reference to understand how secondary school students perceive the relationships among various psychological factors and the relationship between the psychological factors and performance. This study is expected to inform goal setting and content organization in psychological skills training.
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.
PURPOSE Using GPS data from actual field hockey matches, this study examined the effects of position and substitution time on the physical performance of elite female players. METHODS From 25 matches played in 2023, data involving 26 players were collected. Players’ positions were classified as forwards (FW), midfielders (MF), and defenders (DF). Substitution times were segmented into 5, 10, and 15 minutes, respectively. A two-way ANOVA was employed to analyze movement patterns across different exercise intensities as influenced by player position and substitution time, followed by Bonferroni post-hoc tests for further detailed analysis. RESULTS Analysis revealed that both position and substitution time significantly affected exercise intensity. Notably, at a substitution time of 5 minutes, substantial differences were observed in high-intensity movements, including the distance covered at high-intensity and the frequency of high-intensity efforts. Furthermore, the substitution time’s impact was particularly pronounced among forwards and midfielders. CONCLUSIONS Findings suggest that shorter substitution times can enhance players’ active movement, thereby supporting maintenance of tactical adjustments and positively influencing overall performance. Implementing shorter substitution times could be particularly beneficial for optimizing team performance, especially for players in forward positions.
PURPOSE This study aimed to extract football coaches’ categories of performance evaluation factors (PEF) and examine the reflective characteristics of the football coaches’ player and casting judgments. METHODS PEF were extracted through an open-ended questionnaire and categorization from 80 AFC C or higher football coaches. Reflection was calculated in player and casting judgments through an analytic hierarchy process. The difference between the football coaches’ player and casting judgments was examined using SPSS 21.0. RESULTS First, the PEF of football coaches were categorized into four general categories: physical intelligence, psychological intelligence, growth potential, and competition intelligence. Second, the importance of football coaches’ player judgments were reflected by the PEF as football intelligence, situation judgment, football talent, tactical understanding, tactical operation, etc. The importance of the casting judgment were reflected by the PEF as tactical understanding, mediative skills, fitness, tactical operation, situation judgment, etc. Third, a statistically significant difference was noted between player and casting judgments. Football coaches tended to value growth potential and talent as sub-factors in the player evaluations. Football coaches’ PEF were aligned with the importance of player and casting judgments in psychological and competition intelligence as sub-factors such as skills, physical, attitude, passion, etc., but differed from physical intelligence and growth potential as sub-factors including mediative skills, physical, football talent, and tactical understanding. CONCLUSIONS In the football coaches’ player evaluations, the idealistic principle centered on growth potential. However, in the casting evaluation, the realistic principle centered on victory takes effect.
Purpose The aim of this study was to assess accuracy, consistency and performance time of the kick(front kick, side kick) of elite Poomsae players who accustomed excessive high kick. Methods Accuracy, consistency and performance time were measured by 3D motion capture system. Twelve elite Poomsae players(age: 28.83±1.80 yrs, height: 171.75±4.29 cm, weight: 67.58±3.6 kg) performed Poomsae kick according to the four target(philtrum, solar plexus, hypogastric, knee) and target or non-target. Results 1) Both of Front kick and Side kick were evaluated highest accuracy and consistency at philtrum. 2) Both of Front kick and Side kick were tend to increase on accuracy and consistency as the target height increasing. 3) The accuracy of Front kick and Side kick was decreased when the target is not provided at hypogastric and solar plexus. 4) There were statistically significant differences in performance time according to the height of four targets on Side kick but no differences on Front kick in performance time. Conclusion Overall elite Poomsae players who are familiar with kicking in high target were assessed poor kicking performance on lower target.
PURPOSE The purpose of this study was to investigate the characteristics of field and on-ice performances of ice-hockey players and the relationship of performance with subjective joint pain and dysfunction. METHODS A total of 25 male college icehockey players were evaluated for 19 items of performance. Pain and dysfunctions in the lower extremities and lower back were confirmed through the Foot and Ankle Outcome Score, Knee Injury and Osteoarthritis Outcome Score, Hip Dysfunction and Osteoarthritis Outcome Score, and Osweatry Disability Index questionnaire. Players with similar performance characteristics were classified through a cluster analysis, and differences in performance and patient-reported outcomes between clusters were analyzed with a one-way analysis of variance. RESULTS The ice-hockey players were classified into “lower muscular strength and performance (cluster 1),” “lower cardiorespiratory endurance (cluster 2),” and “high muscular strength and performance (cluster 3).” Players in cluster 1 had more frequent ankle and knee joint dysfunctions and pain compared to those in cluster 3. Several performance test items affected the subjective joint score, and the related performance items were more in the proximal joint than in the distal joint. CONCLUSIONS Ice hockey players should perform training to supplement their individual lack of on-ice and field performance. Since performance may be limited because of joint dysfunction and pain, a joint-specific intervention strategy should be applied to improve physical and athletic performances.
PURPOSE The purpose of this study was to investigate the effects of perceived organizational support of high school football players on innovative performance. Of particular note, we focused on examining the mediation effect of self-management between perceived organizational support and innovative performance. METHODS A total of surveys returned was 137 and the data used for the final analysis was 130. The data was processed using SPSS 21.0 statistical program and Lisrel 9.2 for confirmatory factor analysis. RESULTS The results of the analysis were as follows: first, perceived organizational support of high school football players had a positive effect on players’ self-management. Second, players’ self-management had a positive effect on players’ innovative performance. Third, players’ self-management fully mediated between perceived organizational support and players’ innovative performance. CONCLUSIONS The study concluded that maximizing both perceived organizational support and self-management of the high school football players are necessary in order for the organization to achieve high level of innovative performance.
PURPOSE This study aimed to examine the effects of motion analysis and image training using self-modeling with visual cues on the skill performance, imagery, and sports confidence of adolescent female soccer players. METHODS The participants were elite soccer players from two girls’ high school soccer teams divided into an experimental group (D girls’ high school, n=16) and a control group (I girls’ high school, n=13). The experimental group underwent motion analysis and image training when performing penalty kicks, short kicks, and long kicks using self-modeling with visual cues, while the control group underwent training using self-modeling videos without visual cues. Before and after the training, the evaluation score was calculated according to kick performance, and the imagery and sports confidence factors were measured. For the statistical analysis of all collected data, descriptive statistics, the Friedman test, the Mann-Whitney U test, and two-way repeated-measures analysis of variance were used. RESULTS First, on the motion analysis using self-modeling with visual cues, the experimental group’s penalty kick and short kick scores were improved and differed significantly, but no significant change was noted in long kick score. Second, as a result of image training using self-modeling with visual cues, all visual, kinesthetic, mood, and controllability factors of the experimental group improved except for the auditory factor, and the interaction effect was confirmed. In addition, the stated sports confidence of the experimental group was improved and the interaction effect confirmed. CONCLUSIONS The analysis of kick motion using self-modeling with visual cues was effective for the penalty kicks and short kicks of adolescent female soccer players. Moreover, this study confirmed that the analysis of kick motion improved the visual, kinesthetic, mood, and controllability sub-factors of imagery and significantly affected the players’ stated sports confidence.
In this study, hypoxic exposure and training with regard to the current progress during the various models 'live and/or sleep high: train high' by way of 4 weeks in elite level tennis players. The experimental group which SITH(SIT with hypoxic) a 2,500m-4,000m to the graded elevation every 500m increased by the week five times a day, two times four weeks treated to a SIT (sprint interval training) and three hours of exposure in hypoxic chamber(simulated normobaric hypoxic). The CON(control) was conducted same period and methods without exposure to hypoxia that a SIT at sea level. As a results, the haematological variables were Hb and Hct compared Pre with the treatment at the end of 4,000 m(at 4 weeks) has been shown to significantly increased in both groups respectively(p<.05, p<.01; vs. Pre). Aerobic exercise capacity related variables that Time was SITH has been shown to significantly increased at 4,000 m(p<.05; vs. Pre). Also, VO2max was SITH has been showed increased in the same period a tendency(p=.072). Anaerobic exercise capacity related variables that PP(W) was both groups increased significantly at 4,000 m(p<.05; vs. Pre), and PP(W/kg) was CON group has been showed increased in the same altitude a tendency, whereas SITH group has been showed increased at 3,500m and 4,000m respectively(p<.05; vs. Pre). Therefore, this study was unlike previous studies with similar positive results as a follow-up study will be contribute to the attainment of a higher value.
