PURPOSE This study investigates the effectiveness of biomechanics information on intermediate golfers driver swing learning. It analyzes changes in center of pressure (COP) patterns, GRF Direction Inclination, driver performance, and learners psychological responses to determine the learning effects. METHODS Subjects were 32 right-handed male golfers (handicap 15-23) who had no difficulty in performing the golf driver swing (Full swing). Four groups were selected, BF (Biomechanics Feedback group), BVC (Biomechanics Verbal Cue group), CB (Combination group), and CT (Control group), and assigned randomly. Driver swing learning showed results after 6 weeks,and a transfer test was conducted 1 week after the completion of the learning. RESULTS Analysis of COP patterns and GRF Direction Inclination indicated changes in the BF, BVC, and CB groups. Furthermore, analysis of driver distance (m), club head speed (km/h), and ball spin rate (rpm) revealed that during the 6-week acquisition phase, all three groups (excluding the control group) showed improvements in driver distance, club head speed, and ball spin rate. However, there were no statistically significant differences among the groups. In contrast, the transfer test showed statistically significant differences among the groups, with the CB group exhibiting the highest driver distance. Learners' psychological responses during the learning process were trust, understanding, and satisfaction. The understanding factor was relatively higher in the CB and BVC groups compared to the BF group. CONCLUSIONS In summary, biomechanics information (BI) was effective in improving driver performance, and changesappeared in the COP pattern and GRF Direction Inclination, indicating a change in movement. Therefore, BI can be fully utilized for athletes or high-level advanced players and for motor learning for intermediate-level students.However, BI can only improve learning effects by strengthening learners' “understanding” when visual feedback forms and verbal cues are provided together.
PURPOSE The purpose of this study was to explore violence in the Korean sports world and examine the reality of sports violence in the past and present by reflecting the voices of the field and academia through an in-depth analysis. METHODS First, through a systematic literature analysis, the essential problems of sports violence that have been discussed in academia were explored. Next, based on this, perception was explored by applying a multi-case study method to an in-depth analysis of the opinions of experts in academia and the field. Finally, by deriving the research results and discussing them, implications for this study were provided. RESULTS First, the essential problem of sports ethics was the change in sports ethics perception that was different from the sports ethics problem caused by the diversification of victoryism. Second, the essential problems of sports violence were ethics and sports ethics in society with different standards, and the unaltered perception and culture of sports ethics. Third, the problems and causes of sports violence were institutional changes and practical limitations of physical violence, control of the possibility of violence, insensitive verbal violence, cyber violence as a new form violence due to changes in the times, and rationalizations of bystanders. CONCLUSIONS This study is expected to serve as a catalyst for the field and academia by exploring the phenomenon of sports violence in more depth through the problems of violence by type and its causes according to the changing times.
Purpose Recently, studies associated with the negative physical and mental effects of athletes’ pain have received extensive attention. This study confirmed the validity of the pain catastrophizing scale (PCS) developed in clinical settings and is widely used in the sports field, and examined their relationship between the perceived stress levels and fear of pain. Methods The pain catastrophizing consisted of 13 items of three factors which are Helplessness (6 items), Rumination(4 items), Magnification(3 items). To verify the validity, PSC was revised by following the recommended revision guideline procedures. To test the validation of pain catastrophizing, 206 adult athletes were recruited including the collegiate, professional, and national levels. The participants were instructed to complete questionnaires to assess the level of pain catastrophizing, perceived stress, and fear of pain. Confirmatory factor analysis (CFA) to test the fit of measurement model was adopted to examine three higher-order three-factor measurement models. Results In results, confirmatory factor analysis indicated that the Korean version of the pain catastrophizing scale demonstrated a good model fit of measurement when removing one item with a significantly lower factor load as well as the reliability of the scale was reasonable. The pain catastrophizing had a meaningful positive direct relation with perceived stress level and fear of severe pain. In addition, construct validity and predictive validity of PCS showed valid. Conclusions Based on the results of this study, the Korean sports pain catastrophizing scale can be used to measure the subjective pain intensity of Korean athletes. In addition, it is expected to provide fundamental information for evaluating athletes’ post-injury rehabilitation processes.
Purpose The purpose of this study is to examine the socio-cultural background and the current issues of camp training system. This work could find the reason why camp training is continuing despite the regulatory policy. Methods This study compared past national and social situation, sports and education policies of each government, and the changes of sports paradigm through literature review. Results The settlement background of camp training system was explained by the national situation in 1970s and the elite sports policy. However, after the political democratization, the human rights ideology as universal value has developed, and the anti-human rights system which individuals sacrifice for the realization of community became not free in the school sports. Especially, since the 2000s, various social problems caused by camp training have been discussed and the school sports system is undergoing transition under various regulation. In this process, the conflict between the policy makers and the subjects is intensifying. The partial regulation, rather than radical reform, has been the cause of conflict without resolving 'the remnants of past elite sport policy'. The current regulation is limited to the "partial regulatory system", omitting fundamental changes such as the revision and abolition of the student-athletes' college entrance system. Conclusion This study presented two issues to normalize school sports. First, it is necessary to discuss the revision or abolishment of the student-athletes' college entrance system. Second, the existing school athletic system should be transformed into a future-oriented club system. By solving these problems, we can expect the policy effectiveness of current regulation and it will be able to reach the future that the regulatory policy are aiming at.
PURPOSE This study investigated the effect of non-linear periodization strength training on basic and professional fitness of national cross-country skiers. METHODS The body composition (height, weight, BMI, body fat %), basic physical strength (grip strength, lung capacity), anaerobic power (peak power, average power), graded exercise test (maximum heart rate, running time, VO2max, lactic acid), isokinetic strength (trunk strength), and 1RM (bench press, dead-lift, squat, shoulder press, leg curl, bicep curl, cable triceps extension) of nine national cross-country skiers (male: 5, female: 4) were measured. All analyses were performed using SPSS 25.0, Kruskal-Wallis H tests were applied to observe the changes by training methods. Mann-Whitney U tests were used as Post Hoc. RESULTS The results indicated that running time and VO2max post-test improved compared to that for the pre-test for graded exercise test. The lumbar extension strength of the post-test was higher than that for pre-test. There was no significant difference in other variables. CONCLUSIONS It is suggested that nonlinear periodization strength training can be expected to improve running time, VO2max, and trunk strength for cross-country athletes; however, it does not affect the overall changes.
Purpose The purpose of this study was to apply the Self-Assertiveness Training based on Solution-Focused to student-athletes caused by violence in sports. Methods Participants were five Taekwondo athletes in this study. They were consisted of offenders, a accuser, and a victim. The head coach of the team asked for counseling to resolve the conflict. Data was collected with quantitative, qualitative data, and group dynamics. The group counseling program was conducted for 90 minutes a week for eight weeks. Results The results are as follows. First, (application process) the 8-week Self-Assertiveness Training based on Solution-Focused was assessed to be applied step by step and systematically. Second, (qualitative evaluation) as a result of analyzing the observation journal and the interview data, the participants experienced the change of attitude and thought of group members in a short period of time by focusing on enhancing self-assertiveness. Third, (quantitative evaluation) self-assertiveness and attitude of school violence measured by questionnaires were higher in post-survey than pre-survey. In addition, participants' satisfaction with the program was found to be very positive. Discussions and Suggestions Self-Assertiveness Training based on Solution-Focused was found to have a significant effect on conflict resolution among the student-athletes who have experienced violence in sport. This programs was expected to increase the value of use in the sport field. Based on this case study, We suggested for future research.
This study examined the association between physical activity (PA) and the prevalence of chronic disease and chronic depression. Additionally, the relationships between PA and health-related quality of life (HRQoL) among general population, categorized by healthy, chronic disease and depression were investigated. Cross-sectional data includes 9,739 participants (4,351 males, 5,659 females, over 19 years old) who completed physical activity, chronic disease and HRQoL questionnaires from The Fifth Korea National Health and Nutrition Examination Survey (KNHANES). Complex samples frequency, descriptive, cross-tab and logistic analysis were used. Estimated prevalence of chronic disease and depression were significantly different between PA levels and frequency. Based on odds ratios (OR) and 95% confidence intervals (CI), participating in lower levels of daily PA including less resistance and flexibility exercise were associated with an increased likelihood of chronic disease. Less frequency of resistance PA was also associated with an increased likelihood of depression. Estimated prevalence of HRQoL was different according to PA in the healthy and chronic disease populations. Adjusted OR and confidence intervals represented through lower levels of daily PA and less frequency of resistance PA were associated with an increased likelihood of poor HRQoL in the chronic disease population. No significant OR between PA and HRQoL in the depression population was observed.
PURPOSE The purpose of this review was to summarize the current knowledge on the trends in athletes’ health problems (and their preventive strategies) caused by low energy availability (LEA) and relative energy deficiency in sports (RED-S). METHODS In this narrative review, we summarized previous studies by searching the literature in the PubMed, Google Scholar, and Science Direct databases. RESULTS Energy availability (EA) refers to the amount of energy from caloric intake used for exercise, and a LEA is considered as a surrogate marker of RED-S. In several previous studies, chronic low energy availability in female athletes has been reported to cause health problems such as endocrine dysfunctions, immunosuppression, and psychological disorders, and to also affect the hypothalamic-pituitary-gonadal (HPC) axis and bone health. Moreover, it has been suggested that an increase in injury risk and a decrease in exercise performance may occur. CONCLUSIONS Since it can be difficult to recover from the health deteriorations caused by RED-S, early detection (of related signs and symptoms) and prevention are very important. Therefore, athletes, coaches, and parents need to develop educational programs that ease the recognition of the problems caused by various symptoms related to RED-S and promote educational interventions.
To provide the distribution of cardiorespiratory fitness including Bruce treadmill exercise time and estimated peak oxygen uptake (VO2peak) and investigate association with cardiorespiratory fitness and metabolic syndrome, sedentary lifestyle, or education level among Korean adults. Analysis of data on 2,006 adults (19-64 yr) who had completed a maximal grade treadmill exercise test, from the Sports Institute of Sports Science Fitness Standards (KISS FitS) project 2014-2015. The mean maximal exercise time was 11’26’‘, 11’18’‘, 11’06’‘, 10’03’‘ and 8’51’‘ (minutes and seconds) for men 19-29, 30-39, 40-49, 50-59 and 60-64 years of age, respectively, for women, it was 9’49’‘, 9’09’‘, 8’42’‘, 8’01’‘ and 7’33’‘ for the corresponding age groups. The mean peak oxygen uptake was estimated as 42.3, 41.8, 41.2, 37.6 and 33.6 ml/kg/minute for men 19-29, 30-39, 40-49, 50-59 and 60-64 years of age, respectively, For women, it was 34.0, 31.8, 30.3, 28.0 and 26.4 ml/kg/minute for the corresponding age groups. A positive association between cardiorespiratory fitness level and education level was observed for both men and women. Furthermore, participants with sedentary lifestyle had a significantly lower cardiorespiratory fitness than participants with activity lifestyle. Finally, Men with moderate and high fitness level had 50% and 87% lower odds for the metabolic syndrome, and women had 48% and 50% lower odds for the metabolic syndrome, respectively, than the ones with low fitness level after adjustment for age, smoking, alcohol intake, and sedentary lifestyle. These results can be used to track future Korean assessments and to evaluated interventions. The differences in fitness status by education level, sedentary lifestyle or metabolic syndrome can also be used to develop health policies, program and educational services.
PURPOSE The purpose of this study is to analyze the type of and interest in home training video contents using the YouTube platform. METHODS Web crawling was performed using Python and a total of 3,937 sets ofvideo information (title, content, number of views, upload date) were obtained, 3,155 of which were finally selected for the study material. Overlapping and unrelated content were excluded. The data of text underwent 3 stages of preprocessing, the TF and TF-IDF of the keywords were calculated to identify the main keywords, and the LDA algorithm was applied in the topic modeling to successfully identify the types. In order to understand the level of interest by type, the number of views was subdivided into the percentage of the assigned type. RESULTS First, the types of home training videos were classified into bare whole body exercise for aerobic and muscular power strengthening, Pilates exercise for core and upper body strengthening, upper body exercise using tools, lower body line exercise, posture correction and upper body stretching exercise for pain relief, hip-up exercise, dance and tabata exercise for diet, diet and lower body correction stretching exercise for diet, and bare body exercise for core and lower body strengthening. Second, it was found that the proportion and interest were high in the contents of bare whole body exercise for aerobic and muscular power strengthening, dance and tabata exercise for diet, diet and lower body correction stretching exercise for diet. CONCLUSIONS The findings of this study may provide baseline data about the development of the active online home training videos in the market.
