درخت حوزه‌های تخصصی

Background: Vaspin is an adipokine secreted from fatty tissues that has serious effects on adipose tissues, muscles, liver, and inflammation. Purpose: The study aimed at determining the effects of 8 weeks of combined training (resistance and endurance) on the serum vaspin level in obese girls. Method: The examinees consisted of 25 obese female students (BMI> 30) from Sistan-Baluchestan University in 2016-17 academic years who voluntarily participated in the research. Samples were divided randomly into two groups: Training (n = 13) and Control (n = 12). Combined training group had both resistance training (5 stations of foot press, Lat pulldown, biceps curl, knee flexion and knee extension for 75-70 minutes) and; endurance was running on the treadmill; in the 2 first weeks, with 60% HR_max for 25 minutes, in the 3-6 th weeks with 75-65% HR_max for 35 minutes, and in the 6-8 th weeks with 75 -85% HR_max for 40 minutes, continuously, for 3sessions each week. Also 10 minutes at the beginning and at the end of the training were warm up and cool down for athletes. It should be noted that during this period the control group did not participate in any kind of sports activities. After receiving the consent forms, the examinees were given enough information regarding the research procedure and their blood samples were obtained in a standard position, collected in pipes containing EDTA, and centrifuged 24 and 48 hours before and after the first and last training sessions, respectively. The obtained plasmas were kept at -80 ° C and their serum vaspin concentrations were measured by ELISA method using the special Human Vaspin kit. To analyze the data, the paired and independent t-test and SPSS-21 Software were performed; the meaningfulness level p was considered to be less than 0.05 (p < 0.05). Results: Results showed that after 8 weeks of combined training, the vaspin levels, weight, BMI, WHR, and %BF decreased meaningfully in the training Group compared to the control Group (P <0.05). Conclusions: considering the meaningful vaspin reduction in this study, it seems that combined training (resistance and endurance) is beneficial to obese and overweighed people.

Purpose: The purpose of this research is to develop a model of the impact of service quality, brand’s social identity and the attachment to the team on the loyalty of Iranian Premier League football team’s fans. Method: This is an applied study of descriptive-correlation type. The statistical population of this study consisted of the fans of the selected Iranian Premiere Football League. A probability clustering method was used for sampling. Azadi football stadium of Tehran, Imam Reza football stadium of Mashhad, Yadegar Imam Football stadium of Tabriz and Naghsh Jahan football stadium of Isfahan were selected and the questionnaires were distributed in the 12th week of the tournament (2018-2019 season) between fans in above named stadiums. 400 questionnaires were distributed equally in four stadiums and finally, 387 full questionnaires were received and this number was considered as a statistical sample of the research. A researcher-made service quality questionnaire, brand’s social identity questionnaire of Boyle and Magnusson (2007), fans’ attachment questionnaire of Yoon, Petrick, & Backman (2017) and fans’ loyalty questionnaire of Tachis and Tzetzis (2015) were used for gathering information. Structural equation model and LISREL software were used to review and test the hypotheses. Results: The result showed that brand’s social identity has a significant positive effect on the attachment and loyalty of fans (P˂ 0.05). The attachment of fans also has a significant positive effect on their loyalty (P˂ 0.05). Conclusions: It is concluded that for enhancing fan's loyalty, managers of football teams should notice to service quality as a key factor.