ISSN : 1598-2939
The purpose of this study was to explore key kinematic variables of Yeo Seojeong vault by analysing series of vaults performed by Yeo Seo Jeong (YSJ) in order to provide technical support for YSJ and coaches to develop successful training strategy as well as promote adoption of the technique among gymnasts. Two-dimensional video recordings of YSJ during 2019 Korea Cup (1 successful vault) and practice session (3 unsuccessful vaults) were taken. Phase time, changes in position of body centre of mass, velocity of body centre of mass, and changes in various joint angles, and changes in angular velocity were subjected to kinematic analysis. Kinematic analysis revealed that successful vault was possible when YSJ had fast horizontal velocity at horse touch down as well as fast trunk rotation during horse contact, these allowed her to have faster thigh rotation and take-off angle exceeding 90 degrees at horse take-off resulting to reach maximum height and the length during post-flight. Together with higher and longer post-flight, faster rotation and twisting warranted the successful completion of Yeo Seojeong vault. From the unsuccessful vaults, we found that slow horizontal velocity and bent body posture at board contact as well as low body COM, small horizontal displacement of body COM, and slow vertical velocity at every preparation phase had adverse effect on the horse take-off, i.e. improper blocking, weak propulsion. These resulted rather insufficient post-flight with deceleration of rotation and twisting in descending phase of post-flight leading to insecure landing.
This study examines the factors influencing daily sports expenditure using data from the 2023 National Daily Sports Survey conducted by the Ministry of Culture, Sports and Tourism (MCST) in Korea. The study addresses the issue of censored data using a Tobit regression model, with 48.8% of respondents reporting zero spending on sports activities. The results indicate that while there are differences across activities, an increase in household income, employment status, educational attainment, membership of sports clubs, and use of paid facilities is associated with a significant rise in sports expenditure. Moreover, awareness of local sports facilities and engagement in regular, extended exercise sessions also contribute to an increase in spending. Regional variations in spending patterns are evident, with regions outside Seoul displaying higher expenditure. These findings emphasise the necessity for a comprehensive approach to public health and sports policies, encompassing infrastructure improvements, financial incentives, and awareness campaigns, to foster a more active and healthy society.
This study aimed to investigate the impact of fitspiration short video use on women's body appreciation and exercise motivation in China, as well as the relationship between body appreciation and exercise motivation. Short videos have become a popular tool to inspire and motivate people to engage in exercise behaviors. However, the impact of fitspiration short videos on viewers' attitudes and behaviors is still a subject of debate. 300 female Chinese participants who use short video platforms were recruited online. 296 participants agreed to take part and responded to the survey. In addition to frequency distributions, exploratory factor analysis, one-way ANOVA, t-test, Scheffe Test, Pearson correlation analysis and multiple regression analysis have been applied in the analysis of the data. According to the results of the study, participants who reported higher fitspo short video use were more appreciated to their bodies and more inspired to exercise. Besides, women of their elder age presented higher body appreciation than the youngsters despite the influence of fitspo short video use. Finally, women's body appreciation positively affects their exercise motivation. The study concludes that fitspiration short videos do not harm women's body appreciation while positively impact their exercise motivation.
This study assesses the impact of sponsorship contract announcements on stock prices in the Korea Baseball Organization (KBO) League. We adopt the event study methodology to examine abnormal returns (ARs) and cumulative abnormal returns (CARs) of the five Korean conglomerate companies around the dates in which they announce sponsorships with the KBO teams. The results show that all the sample companies have negative ARs at their sponsorship announcement dates. However, we find that CARs recover these initial negative ARs within a maximum of 13-trading-days, suggesting the potential reversibility in the short-term negative value impact of sponsorship. We argue that the negative stock price reactions of sponsorship could be temporary phenomena, possibly being driven by behavioral biases, such as underreactions to the benefits of sponsorship and overreactions to its costs. Overall, this study contributes to the behavioral finance and marketing literature and suggests practical implications for companies strategically managing market reactions to their sponsorship contracts.
This study aims to mathematically verify the final defence positions at which the goalkeeper divides the defence range into half. The most efficient moving line strategy for goalkeeping was proposed, thereby providing basic data for goalkeeping. First, the erroneous claim from existing handball literature that handball goalkeepers should defend at the centre of the goal line and the extension of the ball was mathematically proven. Second, the final defence positions where the goalkeeper can defend at the centre of the defensive range were mathematically verified. Third, the final defence positions of the goalkeeper when shots are made from positions 6 and 9 m away from the outermost goalpost were calculated. Fourth, the positions of 231 shootings that occurred in actual game situations and the defence positions of the goalkeeper based on each shooting were compared with the mathematically verified final defence positions. Consequently, the goalkeeper's efficient positioning strategy was presented through the comparison. An error in the goalkeeper's defensive position suggested in the existing textbook was verified. This study proposed a goalkeeper's movement line that is more efficient than the semicircular movement line that was previously presented.
This paper reviews the psychological responses to athletic injuries and their impact on rehabilitation outcomes. Athletes' mental states, influenced by stress, motivation, self-efficacy, and social support, are critical to recovery. Emotional responses such as anxiety, depression, and fears of reinjury are particularly common among competitive athletes and those experiencing long-term or recurrent injuries, highlighting the need for psychological support alongside physical care. Grounded in stress and coping, social cognitive, and self-determination theories, this review explores how resilience, adaptive coping strategies, and self-efficacy promote successful recovery. Social support from coaches, teammates, family, and healthcare professionals is emphasized as essential for managing stress and sustaining athlete engagement. Practical approaches, including goal-setting, relaxation techniques, and open communication, are identified as effective tools for addressing psychological challenges and improving adherence to rehabilitation protocols. Tailored interventions that consider individual needs ensure better recovery outcomes and long-term well-being. The findings underscore the importance of integrating psychological strategies into rehabilitation programs. Addressing both mental and physical aspects of recovery enables athletes to overcome emotional barriers, build resilience, and achieve a sustainable return to sport and daily life.
