درخت حوزه‌های تخصصی

The present study was conducted with the aim of designing a model of barriers to the advancement of sports justice in  schools of deprived areas with a mixed method. The present study was a sequential exploratory research and a survey one. The research population in the qualitative section included sports teachers in deprived areas that were purposefully selected for qualitative interviews (interviews with 15 participants until reaching the theoretical saturation). The research population of the quantitative section consisted of 181 sports teachers . The data collection tool in the present study was a semi-structured interview and a researcher-developed questionnaire. In order to analyze the research data, coding in the qualitative part and structural equation method in the quantitative part were conducted. In the qualitative part, 25 concept codes and 5 main categories were extracted. In the quantitative part, all 5 main extracted categories (economic, manpower, management, infrastructure, motivation) had a proper fitness.

This article aims to identify the relationships among components of green supply chain management (GSCM) in sport businesses through interpretive structural modeling (ISM) and classifying those components according to their driving and dependence power. This study developed in two phases. In the first phase, literature was reviewed and 12-components of GSCM were identified. Then, in the second phase, the GSCM components in sports businesses were structured using ISM and the hierarchical and interactive model of GSCM in sports businesses was developed. The results showed that among the 12-components, ‘internal/external pressure’, ‘rules, regulations and standards’ and ‘green resources’ were the drivers and cornerstones of the formation and change of other factors. Based on the research findings, the key driver and components for achieving GSCM in sports businesses are providing infrastructure (green resources), adhering to norms (internal and external pressure), and setting its executive guarantees (rules, regulations and standards). Therefore, to achieve ‘economic benefits’ and create a ‘green market’ in the sports industry, emphasis and investment on these issues will be helpful. The current paper attempts to develop a conceptual framework for GSCM in sports businesses.

Background : Digit ratio (2D:4D) is a marker of prenatal androgen exposure that has been associated with behavioral parameters. Individuals with low 2D:4D are more aggressive and tend to engage in more physical activity. Aim: We examined the relationship between 2D:4D and physical activity, sensation seeking and aggression in mature and immature boys. Materials and Methods: The study population consisted of Mazandaran male students aged 9 to 17 years in 2019-2020. The sample was 218 healthy, cluster randomly selected boys (13.77±2.4 y/o) from three schools with no health issues. 2D:4D digit ratio, physical activity, aggression, sensation seeking were measured. Pearson correlation analyzed variable associations. Significance was considered at P ≤0.05. Results : Low 2D:4D ratio was associated with higher physical activity (r≈-0.27), sensation seeking (r≈-0.3), and aggression (r≈-0.21), during childhood and adolescence ( P <0.05). These relationships among right and left hand 2D:4D ratios with physical activity and sensation seeking remained consistent across maturity levels ( P <0.05). Only immature boys had a significant association between 2D:4D ratios and aggression (r≈-0.29, P <0.05). Physical activity was positively associated with sensation seeking (r≈0.25, P <0.05), but not aggression in mature and immature boys. Conclusion : Prenatal testosterone organizes boys' physical activity and behavioral parameters, influencing the later development of sensation-seeking and aggression and greater participation in physical activity. The study has limitations such as a small sample size and a self-report method for assessing aggression. Future research should focus on behavioral observation methods with larger sample sizes.

The athlete's skills and psychological state often influence success in sports performance. The current study aims to explain the performance in paintball competitions based on cognitive resilience and cognitive regulation of emotion. The study participants included all paintball players participating in national paintball competitions (the year 2022), including 17 teams of 7 players, a total of 116 people. In order to investigate the psychological components affecting the athletes' performance, Conner-Davidson Resilience Scale (CD-RISC) and Cognitive Emotion Regulation Questionnaire (CERQ) were used. After completing these questionnaires, IBM SPSS Statistics version 26 was used to analyze the data. Pearson's correlation coefficient and stepwise regression were used to analyze the data. The results showed a significant relationship between resilience scores, the overall score of cognitive emotion regulation, and the scores of 9 emotion regulation strategies with the players' performance in the paintball competition (P≤0.05). Players who achieved better results in tournaments, scored higher on the resilience factor. Also, players who achieved better results in matches had higher scores on emotion regulation strategies like self-blame, positive refocusing, refocus on planning, positive reappraisal, and putting into perspective, and lower scores on the acceptance, rumination, catastrophizing and other-blame strategies. This study showed that cognitive resilience and emotion regulation could be used as predictors of success and winning positions in paintball competitions.