درخت حوزه‌های تخصصی

Introduction: Prescribing the Adrenergic beta-Antagonists is very common in treating cardiovascular diseases. The aim of this study was to compare the effects of aerobic training in patients with coronary artery disease, prescribed two different types of beta-blockers (selective and non- selective) on the patient's lipid profile (Lipoproteins) and FBS (Blood Glucose). Materials and Methods : Sixty patients with coronary artery disease, aged 45-65 years, were compared in two groups of selective (n=36) and non-selective (n=24) users of beta-blockers. The training program consisted of 8 weeks of aerobic exercise on the treadmill (3 sessions per week, about 50 minutes per session, with an intensity of 40% to 60% of the heart rate reserve). Each study patient’s lipid profile and FBS level were obtained before the onset of the study and after the end of the intervention. The collected data were analyzed using repeated-measures Analysis of Variance (ANOVA). Results: In the selective group, lipid profile and FBS did not significantly change. In the non-selective group, FBS and triglyceride levels were significantly reduced after the intervention; however, HDL, LDL, and total cholesterol levels were not significantly changed (P>0.05). Conclusion: The results of this study showed that aerobic training in patients with CAD who used non-selective beta-blockers has more positive effects.

Background: Given the importance of entrepreneurship as a factor to increase job opportunities, the development of entrepreneurial schools as an approach to increase students' job skills has attracted much attention. However, not much research has been done on entrepreneurship schools. However, the introduction of physical education in the field of entrepreneurship can create many job opportunities for students in this field. Purpose: This study was conducted to develop a model for entrepreneurial physical education schools in Iran. Method: This is applied research conducted as a descriptive-survey. The statistical population of the study included managers and teachers of entrepreneurship centers in physical education vocational schools in Iran, from which a sample of 260 people was selected using the Cochran's formula. Research data were collected using a self-administered questionnaire and analyzed using the partial least squares technique and Smart PlS software. Results: Calculation of Cronbach's alpha, combined reliability and average variance extracted showed that the research questionnaire has good reliability and validity. The results of hypotheses test revealed that all three dimensions of entrepreneurship have positive and significant effect on innovation; it was also found that innovation has a positive and significant effect on the entrepreneurial event. Conclusion: in general, the results of this study imply that taking an entrepreneurial orientation can lead to development of entrepreneurial physical education schools.

Purpose: The purpose of this study was to investigate the effect of creativity on performance with the mediating role of knowledge sharing in sports federations. Method: This field study was a descriptive-correlative research and a practical one. The research population consisted of all presidents, vice presidents, general secretaries, committee managers and experts in 51 sport federations (N=780), and 267 subjects were studied through stratified random sampling approach that was consistent to recommended sample by Krejcie & Morgan table. The research tools were adopted from the existing literature to collect the data. The reliability of the research tools were confirmed according to Cronbach’s alpha. Face, content, and construct validity were used to evaluate the validity of the research tools. To test the research hypotheses, structural equation modeling was conducted by applying Smart PLS. Results: The findings demonstrated that "Creativity" had a positive and significant effect on "Performance", as well as "Knowledge sharing". Moreover, "Knowledge sharing "had a positive and significant effect on "Performance". The results also showed that "Knowledge sharing" mediate the relationship between "Creativity", and "Performance "in sport federations. Conclusions: The findings of this study, with emphasis on the role of creativity and knowledge sharing in improving the performance, can be regarded as a platform for enhancing the performance of sports federations. Creativity and knowledge sharing can play a significant role in empowering the human capital that ultimately result in performance development.