---

Objective: The purpose of this study was to investigate the relationship between leadership styles (transformational, transactional and non-leadership) of school administrators and commitment of P.E teachers in Hamedan province.
Methodology: The Statistical population consisted of school administrators (N=110) and physical educators (N=200) in Hamedan province. Statistical sample was equal to statistical population in this study (95 administrators, and 164 physical educators). Multifactor leadership questionnaire (MLQ) and Non-leadership. Organizational Commitment Questionnaire (OCQ, Allen and Meyer) was used. Internal validity of the questionnaire was measured and values of 0.76 and 0.78 were gained respectively. For analysis of data, the following statistical methods were used: Kolmogrov- Smirnov, Spearman correlation and Kendal coefficients at level p&le 0/05.
Results: The results indicated that there was a significant relationship between of transformational, and transactional leadership styles and affective, normative and continuance commitment.
Moreover, the highest relationship between transformational and transactional styles was in normative (r=0/48) and continuance commitment (r=0/40). However, there was not significant relationship between non-leadership style and affective, normative and continuance commitment. Administers of schools can use transformational and transactional leadership styles for maintain and increase of organizational commitment.

---

Abstract

The purpose of the present study was to examine the process of retirement from professional sport from perspective of sports administrator and retired athletes. This survey was descriptive that 42 administrators and 70 retired athletes from Guilan province took part in it. Data gathered through SCT questionnaire which it's content and face validity was confirmed by 15 experts and reliability was computed in a pilot study that included 20 retired athletes and 15 sports administrator (r=0.91). The data were analyzed by using repeated measure, Pearson correlation coefficient and Independent t test. The results showed that, the reasons for sport retirement included achievement of goals championship, sport injuries, financial problems and having problems with coaching staff. Also health-related and job-related problems were the most problems which retired athletes were confronted them. Results showed there were significant differences among problems of sport retirement from the perspective of sports administrator and retired athletes. Also, there were significant relationships between reasons and problems of retirement (p≤0.05). With offering programs such as economic and financial, educational, professional, Public health and nutrition consultant, etc., sport organizations can prepare athletes to face with retirement and its likely problems.

---

The purpose of the present study is to investigate the impact of managerial
changes on the performance of football clubs in Iranian premier league. The
statistical population of present study contains all clubs which participated in 12
seasons of Iranian football clubs premier league from 2001 to 2013. The whole
data was extracted from the archive of premier league organization and Foolad
Mobarakeh Sepahan sport club. Improvement or degradation of football clubs in
each season compared to the previous season based on managerial changes or
stability has been investigated. The data was analyzed with one way ANOVA with
Gabriel post hoc test, and independent sample t test in significant lower than 0.05.
Results revealed that managerial stability had significant effect on improvement of
the performance, and successive changes of executive managers had significant
impact on degradation of performance. Results showed that managerial changes
caused a 2.48 decline in their rank on the league schedule, and managerial
stability caused a 1.00 improvement in their rank on the league schedule.
Generally analysis of results supported the hypothesis that managerial stability
provides enough time for implementation and realization of long term and short
term goals and final improvement on clubs performance.

---

The purpose of this study was investigating the impact of digital marketing on Competitiveness of Sports Businesses (sports clubs in Rasht) through competitive intelligence and entrepreneurship This research was descriptive-correlational in terms of type, applied purpose and field implementation method. The statistical population of the present study was all managers and coaches of sports clubs in Rasht. Statistical sample According to the method proposed by Barclay et al. (1995) to determine the minimum sample in structural equation modeling was used. To generalize the sample to the research community, 220 questionnaires were distributed among managers and coaches of sports clubs in Rasht and 196 questionnaires were analyzed. SPSS and SMART PlS have been used to analyze the data. Findings showed that digital marketing has a direct and significant effect on competitiveness, competitive intelligence and entrepreneurship. Also, competitive intelligence has a direct and significant effect on competitiveness and entrepreneurship. entrepreneurship has a direct and significant effect on competitiveness. According to the research findings, club managers can use the positive effects of digital marketing along with using the advantages of competitive intelligence and entrepreneurship to increase the competitiveness of their business in order to increase customers, increase profitability and productivity of the club.

---

The outbreak of Covid-19 disease has had several effects on the sports industry in general and championship and professional sports in particular. One of these effects was the one-year postponement of the 2020 Tokyo Olympics as the world's largest sporting event. The main question of the present study was whether the postponement of the Tokyo 2020 Olympics is an opportunity or a threat for our country's sports caravan? In order to answer this question, grounded theory qualitative research method was used. Grounded theory includes several styles that were used in this study through the emerging finding of Glaser (1992) in data analysis. Sources used include interviews with athletes, coaches, veterans, experts, experts, and officials, as well as news and documents published on reputable Internet portals, including the International Olympic Committee website, the National Olympic Committee website, and the website of the Olympic Games Federations of the Month. 2019 to March 2020. Logical induction method was used to analyze the data during three stages of open, axial and selective coding. The results indicate that a total of 92 independent initial marks were generated in the extracted codes. These signs were then classified into 38 signs due to their multiplicity, which was based on conceptual and semantic similarity. As a result, sub-symptoms were classified into 12 sub-categories. Among these, two main categories of opportunities and threats of postponing the Tokyo 2020 Olympics emerged. Opportunity codes include 6 items (maintaining the health of athletes and people, increasing fitness, earning quotas, improving injuries, coherent planning, increasing youth experience) and also codes identifying threats of postponement of the Tokyo 2020 Olympics include 8 items (physical and mental injuries, disorder). In the training program, there was a decrease in the level of performance, athletes' injuries, athletes' retirement, uncertainty of quotas, coaches' contracts, financial difficulties). According to the results, the one-year postponement of the Olympic Games due to the outbreak of the Corona virus can be considered an opportunity for athletes to gain more experience and plan by the federations and the International Olympic Committee, which can increase the chances of the country's athletes winning medals Upgrade.