مطالب

Background: Perturbation training which is in the context of volleyball routine practice is a type of neuromuscular exercises that is useful in overhead sports; leads to contraction responses through unpredictable perturbation. Aim : The present study aims to investigate the effects of perturbation training on volleyball players strength proprioception and performance. Materials and Methods: Twenty-four volunteer male volleyball players (age: 24.42±2.15 years; height: 181.46±3.00m; Weight: 73.87±3.77kg; BMI: 22.43±0.80) were recruited and randomly assigned into perturbation and control groups, Before the intervention, a set of isokinetic dynamometry was carried out to measure shoulder proprioception as well as rotator cuff muscles strength, what is more, the upper extremity performance was evaluated using Y-Balance Test. For a course of 6 weeks, players of the perturbation group implemented perturbation trainings, 3 times weekly while the control group performed its routine training. The dynamometry was repeated at the end of training period to compare trainings outcome. The Repeated Measures ANOVA statistic was used to find differences between groups. Results: A significant difference in shoulder proprioception, as well as the YBT-UQ test, was observed between the groups; Also, the ANOVA showed a significant difference ( P <0.05) in functional strength ratio followed by 6 weeks of perturbation training. Conclusion: Perturbation trainings might have benefit to volleyball players conditioning by improvement rotator cuff strength, shoulder proprioception and upper extremity performance. Given this adopting kind of training as a part of regular basic training for volleyball players is highly recommended.

Purpose- The "Smart Village" approach includes long-term social, economic, and environmental activities of the rural community that involve widespread participation in local governance processes, promoting entrepreneurship, preserving the rural environment and, ultimately, sustainable development of rural areas. Therefore, the development of scenarios that facilitate the realization of the smart village approach in the peri-urban settlements of the metropolis of Tehran should be emphasized.Design/methodology/approach-This research is a descriptive-analytical study from the perspective of its objectives it is applied. Data and information were collected through library research, documentary studies, and survey methods (interviews). By reviewing scientific sources and conducting interviews with experts, 57 influencing factors of the smart village approach on the sustainability of peri-urban settlements were identified, categorized into 5 dimensions, and a total of 35 people, including managers of relevant organizations and university experts, were interviewed. The analysis of data was based on futures studies techniques, including structural analysis and mutual effects analysis (done using Micmac and Scenario Wizard software).Finding- The research findings show that there are a very large number of possible scenarios for the impact of the smart village on the sustainability of peri-urban settlements in the metropolis of Tehran within the range of Islamshahr County. Among them, 14 scenarios have weak compatibility and only 1 scenario is in a state of strong and sustainable compatibility (zero incompatibility). The first scenario, which is a positive one, has a mutual effect score of 733 and a compatibility value of 13, while the second scenario, which indicates unfavorable conditions for the future impact of the smart village on sustainable development, has a mutual effect score of -144 and a compatibility value of 5. The third scenario also has a compatibility value of -2 and with a mutual effect score of 63, it can be one of the impactful scenarios for the smart village on the sustainability of peri-urban settlements in the metropolis of Tehran. At the end of the research, operational suggestions are presented to enhance the indices of a smart village to achieve sustainable development in the rural settlements of the studied area.Originality/Value - For the first time in Iran, scenarios have been developed on the impact of smart villages on the sustainability of peri-urban settlements, and from this perspective, it is innovative and among the first research in the field.