درخت حوزه‌های تخصصی

Background and Purpose: Increasing participation in sports activities has increased the incidence of sports injuries. Considering the short and long term complications of sports injuries, the need to prevent them is one of the most important goals. The purpose of this study was to evaluate the effects of ankle bracing on the ankle plantar flexor muscles activity in different foot position during drop landing with and without fatigue. Method: Fourteen female college athletes participated in this study. Five models of 5 and 10 degrees medial, lateral and normal wedged insoles were used to simulate the position of the feet on the ground at the wrong landing technique. The Medial Gastrocnemius (MG) and Peroneus Longus (PL) muscles activity 100 ms before and 100ms after landing in different foot position before and after muscles fatigue with and without ankle bracing was recorded with surface electromyography. Repeated measures ANOVA was used for statistical analysis (p≤0.05). Results: The results showed that the effect of time on the activity of MG and PL muscles in landing with brace was significant, so that the MG muscle before landing and PL muscle after landing had a higher activity in both times before and after fatigue (p≤0.001). The activity of this muscles was not significant when using the ankle brace during landing in different positions (p˃0.05). Conclusions: According to the results of this study, lace-up brace can help to increase muscles activity when they were fatigue, while the using of brace does not affect muscle activity when landing perform in different positions without fatigue. According to the results, In the case of a suggestion to use brace for athletes, all aspects of using this equipment should be considered.

Purpose: The purpose of this study was to investigate the dimensions of brand impact on sports, economic and professional experts, managers and experts in Kermanshah province. Method: This is a descriptive-survey research. The statistical population consisted of 120 experts, managers and experts in sport and economic in Kermanshah province who were selected by random sampling. In this study, 87 experts including experts, managers and experts in two fields of sport and economics completed a researcher-made questionnaire assessing the dimensions of sport brand effectiveness. The measurement tool was a questionnaire of sport brand management whose reliability and validity were tested for this research. The Cronbach's alpha value for all factors is 7 or higher, indicating the appropriateness of the questions posed to assess each of the dimensions affecting sport brand management. SPSS software version 20 was used for data analysis. The results of the tests showed that all four sectors (managerial, economic, cultural and social) influenced sport brand management. Results: Finally, the overall summary of the tests shows that social media management brand with a mean of 3.09 and cultural management factor with a mean of 1.82 have the highest and lowest priority in influencing sport brand, respectively. Conclusions: The research results show that the social sector of the brand has a higher priority and microeconomic and macroeconomic indicators should be recognized.

Purpose: The purpose of this study was to analyze the public relations status of Sports and Youth Organization in Kohgilouyeh and Boyer Ahmad province. The present research was applied and study was a consecutive hybrid exploratory strategy and is implemented by qualitative content analysis and questionnaire quantitative survey. Method: Statistical society in qualitative section, ten people in Kohgiluyeh and Boyer Ahmad provincial authority of sports and youth, and in quantitative personnel in public relations department and 46 provincial active board and sports reporters in the province in total there were 150 people. Data collection tool was a face-to-face interview and a researcher-made questionnaire. Based on the findings of the qualitative section, a questionnaire was designed and its face and content validity was evaluated by several experts in the field of public relations and sport management and its construct validity was done by confirmatory factor analysis and its reliability was Cronbach's alpha coefficient of 0/94. Results: The qualitative data were analyzed by qualitative data encoding method and in quantitative part of descriptive statistics, frequency table was included and in the inferential part Friedman test was used. Conclusions: The results showed that the public relations status of Sports and Youth Organization in this province was below average, and Friedman's test showed that the importance, rank, and status of public relations were totally different.

Purpose: On the other hand, fatigue is one of the most important indicators of aging syndrome. This study aimed to investigate the relationship between the level of physical activity and fatigue in elderly residents of rest homes in Tehran. Method: This was a descriptive correlational study in which 20 rest homes located in Tehran province constituted the study population. By visiting rest homes, the eligible subjects were chosen. Physical activity was measured by the Physical Activity Scale for the Elderly (PASE). The FACIT Fatigue Scale is a short, 13-item, easy to administer tool that measures an individual’s level of fatigue during their usual daily activities over the past week. Nutritional status was evaluated by mini nutritional assessment (MNA). Results: The results of statistical analysis indicated a significant and positive correlation between PASE and FACIT scores (r=0.48, p<0.01) while, there was a significant negative correlation between FACIT score and age (r=-0.23, p<0.01). Also, there was a significant positive correlation between MNA and FACIT (r=0.40, p<0.01). In addition, a significant positive correlation was found between MNA and PASE score (r=0.31, p<0.01). Conclusions: The findings of this study indicate that holding sports classes under the supervision of exercise physiologists is an essential matter to increase health and prevent age-related complications in elderly residents of Tehran rest homes.