درخت حوزه‌های تخصصی

Background: Limited research has investigated the use of chamomile as an antioxidant supplement in team sports . Purpose : The aim of this study was to investigate the effect of chamomile extract on antioxidant indices in young female futsal players. Methods : 20 young female futsal players (Average age: 22.08 ± 5.03 years, weight: 54.4 ± 8.62 kg, and body mass index: 20.56 ± 2.6 kg/m2) were divided randomly into two groups, experimental group (10 people) and control group (10 people). The experimental group consumed 1500 mg/day of the supplement for one week, while the control group received a placebo. Both groups were nutritionally controlled during this period. After the end of the intervention period, two simultaneous futsal matches were held for two groups (two teams of 5 players in each match). Anthropometric characteristics were evaluated in resting conditions and biochemical markers were measured before the intervention, immediately after the competition, and 30 minutes after the competition. Data analysis was performed using the repeated measurement variance test. The level of significance was considered at P<0.05. Results : The results showed a significant increase in SOD levels (P<0.05) and a significant decrease in CAT levels (P<0.05) immediately after the competition in the supplement group, but this significance was not seen 30 minutes after the competition. Conclusion : One-week consumption of chamomile improves antioxidant defense in young female futsal players. Conducting studies with long-term follow-up to confirm these findings should be considered.

The purpose of the present article is to design indicators and variables that represent the value of volleyball players. This research method is applied, which was done in a quantitative and qualitative way. The research tool was a semi-structured interview with experts in the field of player valuation. In this research, the statistical population included all the experts and specialists in human resources and financial management issues in sports, and also volleyball experts. The sample size included a number of volleyball sports experts who expressed their ideas to determine the variables. A total of 60 variables were extracted, of which 40 are quantitative indicators and 20 are qualitative indicators. These indicators are not only effective in the selection of players, but can also determine the price and final value of the players.

The purpose of this study was to investigate the effect of market orientation on the job attitudes of employees in sports stores in Mazandaran, IRAN. This research was a descriptive-correlational and applied study. The statistical population consisted of all employees in Nike, Adidas, Reebok, Puma, and Majid sports store. Based on Structural Equation Modeling (SEM), the research sample included 200 subjects. Standard questionnaires were used for data collection. Linear regression and structural equation modeling (SEM) with Spss18 and Lisrel version 8.3 software have been used to investigate the research hypotheses. According to the research findings, market orientation affects employees' attitudes toward the sports stores and market orientation explains 69 percent of the variance of job attitudes. Moreover, market orientation components were effective on job satisfaction, organizational commitment, role conflict, and turnover intention. Market orientation components were also effective on job attitudes of the sports store employees. Therefore, the special attention to market orientation in promoting productivity, satisfaction and increasing commitment of employees, can be critical in achieving the goals and strategies of sports stores.

The purpose of this research was to identify the factors affecting the development of championship swimming in Yazd, Iran from the perspective of coaches, experts, and managers. 123 experts in the field of swimming were randomly selected as the research sample, and a researcher-developed questionnaire was used for data collection. Data analysis was performed using a one-way analysis of variance and the Kruskal-Wallis test. The results showed that all coaches, experts, and managers had a consensus on improving the level of scientific and technical knowledge of coaches, controlling and monitoring the activities of coaches, finding talent using scientific and specialized methods, and establishing swimming schools, facilities, and equipment. Therefore, these factors were found to be the most important and effective factors in developing the championship swimming in Yazd province.