درخت حوزه‌های تخصصی

Background: Fatigue as one of the physiological factors can affect the physical performance of athletes. This issue is more important in young athletes and can expose them to injury. Aim: The purpose of this research was to investigate the effect of functional fatigue on the performance and landing mechanics of adolescence taekwondo athletes. Materials and Methods: This was a semi-experimental study. Participants were 20 male teenage taekwondo players. Pre-fatigue measurements included side-jump tests, figure-8 hop tests, and single-leg triple jump tests, as well as a lower limb biomechanics assessment using a landing error scoring system. After the functional fatigue protocol was applied, all the pre-fatigue variables were evaluated again. In order to examine the intra-group changes of the research variables in the pre and post-test stages, the paired t-test at a significance level of P≤0.05 was used. Results: The paired-t test results revealed that following fatigue induction, performance in the side-jump and figure-8 hop tests significantly deteriorated (P<0.05). Additionally, performance in the single-leg triple hop test declined (P<0.05). Moreover, landing error significantly increased (P<0.05). Conclusion: The finding of this study indicated that after applying fatigue, the subjects' performance decreased and the biomechanical error of the lower limbs increased. Fatigue can significantly impact adolescent taekwondo athletes' performance and biomechanics. So, taekwondo coaches should implement effective strategies to mitigate fatigue, enhance athletes' conditioning, and optimize their performance in training and competitions.

This research was conducted with the aim of integrating practical and theoretical strategies to enhance the motivation for sports participation among workers. The design of this research was cross-sectional and correlational. The statistical population of the present study consisted of all employees of Iranol Oil Company in Tehran in 2020, totaling 890 individuals. Among them, 261 were selected based on the Krejcie and Morgan table using the available sampling method. In this study, the tools used were the Sports Participation Motivation Scale (Gill et al., 1984), the Cognitive Emotion Regulation Questionnaire (Garnefski and Kraaij, 2006), and the Subjective Vitality Scale (Ryan and Frederick, 1997). Additionally, structural equation modeling was used to test the research hypotheses. The research findings indicated that the model had a good fit. Accordingly, the findings showed that in the final model, the standardized path coefficients for adaptive and maladaptive emotion regulation on sports participation motivation were 0.17 and -0.40, respectively. Therefore, the skill of emotion regulation (practical strategy) was significant in the relationship between the feeling of vitality (theoretical strategy) and sports participation motivation. Using the results obtained from the developed model of sports participation motivation, a foundation is laid for creating practical programs to improve the inclination towards sports participation among various segments of the population. Additionally, implementing interventions to educate individuals on learning emotion regulation strategies through changes in cognition and behavior to achieve greater self-regulation provides a practical basis for increasing sports participation. Ultimately, focusing on enhancing community vitality serves as a theoretical approach to reducing maladaptive emotion regulation, thereby fostering the growth of sports participation motivation.

Today, sports diplomacy with different countries is one way to develop the sport at an international level. The current paper was conducted with the approach of improving the diplomacy of sports federations of Iran and Arab states of the Persian Gulf. The paper is qualitative, applied, and was carried out using Colaizzi's phenomenological methodology in 2022. Moreover, Participants in the research included individuals related to the subject. Furthermore, the sampling method was purposeful, and until the extraction of completely non-repeated strategies from the interviews; 21 interviews were conducted in a semi-structured manner. Factors affecting the improvement of the diplomacy of the sports federations of Iran and Arab states of the Persian Gulf consist of 75 primary strategies in the form of 11 main categories including: media content, behavioral norms, infrastructure development, management strategy, political dimensions, security dimensions, sports interactions, international solidarity, sports communication, national prestige, and educational experiences. Some of the solutions identified include benefitting from popular social networks such as Instagram to share common content with Arabic language sports pages, no provocative interviews by athletes and coaches, preventing spectators from chanting racist slogans, facilitating the entry conditions of Arab spectators in international sports competitions in Iran and mutual support of the sports federations in Iran and Arab states of the Persian Gulf to the sports representatives of the Middle East region in sports events at the world level.