درخت حوزه‌های تخصصی

Purpose: Diabetes mellitus is the most common metabolic problem worldwide, which is associated with hyperglycemia and structural and functional disorders of the nervous system. The aim of the present study was to investigate the effect of endurance training on serum glucose levels, weight changes and Like Growth Factor 1 (IGF-1) protein expression in the hippocampus of diabetic rats. Method: For this study, the samples included 48 male Wistar rats (8 weeks old), which were divided into 4 groups: control (C), the diabetes control (DC), diabetes-training (DT) and exercise (T). In order to induce diabetes, streptozotocin injection was used. 5 sessions per week of endurance activity were performed for 6 weeks. 48 hours after the completion of the exercise program, hippocampal tissue was dissected and extracted. ELISA method and one-way variance test were used to analyze the data. Resalts: Based on the results, serum glucose levels decreased after six weeks of endurance training (p=0.001). The amount of IGF-1 in group DC was significantly lower compared to all groups DT, T, and C (P≤0.05). But the DT group had no significant difference with the C and T groups (P=0.210 and P=0.226, respectively). On the other hand, the amount of IGF-1 in group T was only significantly different from group D (P=0.001). The correlation between blood glucose and IGF-1 was significant (p=0.001, r=0.820). Conclusion: Diabetes reduces IGF-1 and hyperglycemia, but exercise moderates the effect of diabetes on IGF-1. Considering the appropriate duration of training and the correlation of this protein with blood glucose, maybe endurance training can reduce the negative effect of diabetes.

Background: China is the undisputed power of sports in the world today and due to the close relations of China and Iran in many different aspects, the bilateral scientific works can be considered as well. Aim : The purpose of this study was to analyze the opportunities for the development of championship sports with a look at the cooperation document between Iran and China. Materials and Methods: The present study was a qualitative (descriptive-analytical) type of library studies in terms of applied purpose and in terms of data collection, which examined scientific works including books, articles, and notes during 2010-2021 about Iranian sports and China took place. Results: The research findings showed that the Islamic Republic of Iran and China, as two superpowers of West and East Asia, can have different sports interactions with each other in team and individual disciplines, respectively. In addition, the Iranians can use sport as a starting point and a tool to facilitate and accelerate their political-trade relations by winning 76 and the Chinese by winning 696 medals in the Summer and Winter Olympics; For example, the Chinese in the fields of swimming and diving, gymnastics, table tennis and recently weightlifting have emerged as the undisputed power of the world, while Iran can also compete in team sports such as football, volleyball and even Basketball to share its experiences in human resource development as the most important precondition for national excellence with this country. Conclusion: All in all, sport as a facilitator between Iran and China can develop the future political communications. China is the pioneer of Olympic Games and 25 years agreement can lead to brilliant future for Iranians.

We have reviewed the coaches' role in German talent identification and development football programs and followed the qualitative meta-synthesis method with Sadowski and Barroso's approach. We verified 56 documents and extracted 695 nonrepetitive open codes and 135 concepts. We showed that coaches' roles in a talent program consists of Competency, Leadership, and Organizational components. Competency components include selection, training, coaching, and performance. Leadership components include Technical and DFB & DFL. Finally, the Organizational components comprise the Double Pass, coordinators, and DFBnet. Properly organizing and equilibrium between these three parts can leverage and lead to successful coaches and the program. According to the critical role of alent programs and coaches in sports development, setting up national TID and TDE programs, especially in sports, are very important. Implementing a large-scale project with various criteria is complex; because it requires high cooperation, mutual understanding, and national determination. Many employees are involved in such systems with instrumental, scientific, experimental, and specialized aspects.