ترتیب بر اساس: جدیدترینپربازدیدترین
فیلترهای جستجو: فیلتری انتخاب نشده است.
نمایش ۱٬۷۶۱ تا ۱٬۷۸۰ مورد از کل ۱٬۷۹۳ مورد.
۱۷۶۱.

اثر 4 هفته بی تمرینی متعاقب 3 ماه تمرین هوازی بر سطوح سرمی TNF-α و مقاومت انسولین در مردان دیابتی نوع2

کلیدواژه‌ها: تمرین هوازی بی تمرینی گلوکز انسولین دیابت نوع 2 سطوح سرمی TNF-α مردان

حوزه‌های تخصصی:
تعداد بازدید : ۳۳ تعداد دانلود : ۲۷
مقدمه: هدف این مطالعه بررسی اثر 4 هفته بی تمرینی متعاقب 3 ماه تمرین هوازی بر سطوح سرمی TNF-α و مقاومت انسولین در مردان دیابتی نوع 2 بود. روش: نمونه آماری این پژوهش 24 نفر مرد مبتلا به دیابت نوع دو 30 تا 40 سال با شاخص توده بدنی 30 تا 34 بودند که داوطلبانه انتخاب و به صورت تصادفی در دو گروه کنترل (12 نفر) و گروه تجربی (12 نفر) قرار گرفتند. گروه تجربی به مدت 12 هفته، و هر هفته سه جلسه تمرین هوازی، تمرینات را با شدت 55 درصد حداکثر بیشینه شروع کرده و در پایان هفته هشتم شدت تمرینات به 75 درصد رسید. 48 ساعت قبل و بعد از اجرای پژوهش و پس از 4 هفته بی تمرینی، شاخص های آنتروپومتریکی اندازه گیری شده و همچنین با هدف اندازه گیری TNF-α، گلوکز و مقاومت انسولین در هر دوگروه درحالت 12 ساعت ناشتا مقدار 4 سی سی خون گرفته شد. جهت تجزیه و تحلیل داده ها از آزمون تی مستقل، و برای بررسی تغییرات بین گروهی و تحلیل درون گروهی از آنالیز واریانس تکرار مکرر به همراه آزمون تعقیبی LSD استفاده شد. سطح معنی داری p<0.05 درصد بوده و تحلیل داده ها با استفاده از نرم افزار SPSS نسخه 22 انجام شد. یافته ها: نتایج نشان داد 12هفته تمرین هوازی باعث کاهش معنی دار سطوح سرمی (013/0=P) TNF-α، گلوکز ناشتا (000/0=P) و مقاومت انسولین (013/0=P) در گروه تجربی شده، و این تغییرات پس از 4 هفته بی تمرینی همچنان حفظ شد. در شاخص های آنتروپومتریکی ازجمله وزن بدن (000/0=P)، توده بدن (000/0=P) و درصد چربی بدن (000/0=P) متعاقب 12هفته تمرین هوازی مشاهده شد، این مقادیر پس از 4 هفته بی تمرینی حفظ شد. نتیجه گیری: 3 ماه تمرین هوازی باعث بهبود سطوح TNF-α گلوکز ناشتا، و مقاومت انسولین و نیز کاهش معنی دار شاخص های آنتروپومتریکی در مردان دیابتی نوع 2 شد. سطوح این متغیرها پس از 4 هفته بی تمرینی، همچنان به میزان معنی داری پایین تر از سطوح پایه حفظ گردید.
۱۷۶۲.

A Meta-Analytical Comparison of Aerobic, Isometric Exercises and Resistance Exercise on Visual Acuity and Eye Health in the Elderly Population

کلیدواژه‌ها: Visual acuity eye health Elderly aerobic exercise Resistance exercise

حوزه‌های تخصصی:
تعداد بازدید : ۳۱ تعداد دانلود : ۲۰
Purpose: With the aging population facing an increased risk of ocular conditions such as glaucoma, age-related macular degeneration (AMD), and diabetic retinopathy, finding non-invasive methods to support eye health is essential. This meta-analysis aims to compare the effects of aerobic, isometric, and resistance exercises on visual acuity and overall eye health in the elderly, seeking to identify which type of exercise may be most beneficial for maintaining or improving eye health. Method: A systematic review and meta-analysis were conducted following standard guidelines. Electronic databases, including PubMed, Scopus, and Web of Science, were searched for relevant studies published between 2000 and 2023. The search included terms related to aerobic, isometric, and resistance exercises, visual acuity, intraocular pressure (IOP), retinal health, and elderly populations. Studies were screened and selected based on predefined inclusion criteria, focusing on research involving elderly participants and outcomes related to eye health. Results: A total of 15 studies met the inclusion criteria, encompassing 1,200 participants with a mean age of 68 years. The meta-analysis revealed that aerobic exercise significantly reduced intraocular pressure (mean difference = -2.5 mmHg, 95% CI: -3.2 to -1.8, p < 0.001) and improved retinal health markers (effect size = 0.35, 95% CI: 0.20 to 0.50, p < 0.01). Resistance exercise was associated with enhanced visual acuity (effect size = 0.28, 95% CI: 0.15 to 0.41, p < 0.01) and a reduction in the progression of AMD (relative risk = 0.70, 95% CI: 0.50 to 0.90, p < 0.05). Isometric exercises showed minimal impact on eye health compared to the other exercise types (effect size = 0.05, 95% CI: -0.10 to 0.20, p = 0.40). Conclusion: This meta-analysis supports the idea that aerobic and resistance exercises can protect visual acuity and overall eye health in the elderly, likely due to improved blood circulation, reduced oxidative stress, and enhanced retinal function. In contrast, isometric exercises showed minimal benefits, potentially due to their limited impact on systemic circulation. These findings suggest the importance of specific physical activities for mitigating age-related ocular disease risks, with implications for clinical and public health guidelines aimed at preventing visual decline in aging populations.
۱۷۶۳.

تأثیر دوزهای مختلف کافئین، سیترولین مالات و تقویت پس فعالی بر ارتفاع پرش، توان بی هوازی و توان هوازی زنان کیک بوکسینگ کار(مقاله علمی وزارت علوم)

کلیدواژه‌ها: کافئین سیترولین مالات توانمندسازی پس فعالی توان بی هوازی ظرفیت هوازی پرش عمودی Vo2max

حوزه‌های تخصصی:
تعداد بازدید : ۲۹ تعداد دانلود : ۳۷
هدف: در این پژوهش به بررسی تأثیرات حاد دوزهای مختلف کافئین، سیترولین مالات و تقویت پس فعالی (PAP) بر توان اندام تحتانی، ظرفیت بی هوازی و عملکرد هوازی در زنان کیک بوکسینگ کار پرداخته شد. مواد و روش ها: هفتاد شرکت کننده به صورت تصادفی در هفت گروه قرار گرفتند: کنترل (Con)، کافئین 4 میلی گرم/کیلوگرم (Caf4)، کافئین 5 میلی گرم/کیلوگرم (Caf5)، کافئین 4 میلی گرم/کیلوگرم+سیترولین مالات (Caf4+CitMal)، کافئین 5 میلی گرم/کیلوگرم+سیترولین مالات (Caf5+CitMal)، کافئین 4 میلی گرم/کیلوگرم+سیترولین مالات+PAP (Caf4+CitMal+PAP) و کافئین 5 میلی گرم/کیلوگرم+سیترولین مالات+PAP (Caf5+CitMal+PAP). یک ساعت قبل از اجرای آزمون مکمل ها استفاده شدند. تمام مکمل ها (شامل دارونما و گروه های مداخله) از نظر ویژگی های حسی (رنگ، طعم و بو) یکسان بودند. پس از ۵۰ دقیقه از مصرف مکمل، آزمودنی ها به مدت ۱۰ دقیقه گرم کردن انجام دادند. به منظور بررسی عملکرد ورزشی از آزمون های عملکردی شامل آزمون پرش سارجنت (برای اندازه گیری ارتفاع پرش عمودی)، آزمون دویدن بی هوازی (RAST) (به منظور سنجش توان بی هوازی) و آزمون شاتل ران 20 متری (برای تخمین حداکثر اکسیژن مصرفی (maxVO2) استفاده شد. PAP از طریق تمرینات پلایومتریک پنج دقیقه قبل از آزمون ها اعمال شد. یافته ها: نتایج نشان داد، ترکیب کافئین 5 میلی گرم/کیلوگرم با سیترولین مالات و PAP (Caf5+CitMal+PAP) منجر به بهبود معنادار در ارتفاع پرش عمودی (12 درصد) و توان بی هوازی (15 درصد) در مقایسه با گروه کنترل شد (0.05P<). درمقابل، مصرف کافئین 4 میلی گرم/کیلوگرم به تنهایی (Caf4) بهبود معناداری را ایجاد نکرد. درباره عملکرد هوازی، ترکیب کافئین و سیترولین مالات (Caf4+CitMal و Caf5+CitMal) افزایش معناداری را در VO2max ایجاد کرد؛ به طوری که گروه Caf5+CitMal بهبود 10 درصد در مقایسه با گروه کنترل نشان داد (0.05P<)؛ با این حال، افزودن PAP تأثیر بیشتری بر عملکرد هوازی نداشت. نتیجه گیری: این یافته ها نشان می دهد که دوزهای بالاتر کافئین (5 میلی گرم/کیلوگرم) در ترکیب با سیترولین مالات و PAP، به طور خاص بر بهبود توان انفجاری و ظرفیت بی هوازی در زنان کیک بوکسینگ کار مؤثر است.
۱۷۶۴.

Why they do not Exercise Regularly?

نویسنده:

کلیدواژه‌ها: Regular Exercise goals obesity Overweight Health care

حوزه‌های تخصصی:
تعداد بازدید : ۲۸ تعداد دانلود : ۱۹
Purpose: Analysis current goals at the gyms would answer some of the questions about the (un)continuation of physical activity (PA) and point out factors that have less attention in care and health program. This article examines women's exercise space in order to answer an important question: ‘Why most women have problems with regular PA and cannot permanently benefit from a long-term regular exercise program?’ This was a qualitative study. Method: Data collection was carried out through attendance at women's gyms and registration of symbols and symptoms and analyzed by thematic analysis (Broun & Clark, 2006). Results: Results showed that there were two main themes for women to participate in the PA which can be defined in terms of goals. Objectives called fear of obesity and overweight; and the goals of trying to be healthy and health management. However, the categories related to these two theme overlap but they are different in nature and make fundamental changes in women’s PA performance. By examining the persistence of women's participation in PA this hypothesis is raised; i.e., women’s long-term goals and regular attendance in PA is related to goals created by the health management goals and personal responsibility about their own health behaviors while irregular attendance activity is related to priorities and goals created by the fear of obesity atmosphere. Conclusions: The preliminary evidence of the presence of women in the practice confirms this claim but additional studies are needed to confirm this .
۱۷۶۵.

Designing an Entrepreneurial Education Program Model with Emphasis on the Relationship between Industry and University in the Sports Science

کلیدواژه‌ها: sports industry Sports Science university data foundation entrepreneurial approach

حوزه‌های تخصصی:
تعداد بازدید : ۲۸
Purpose: Today, sport is considered as an industry and sports as a science discipline recognized in the world, requires effective cooperation with industry. The development of sports is accompanied by the development of science, which doubles the need for appropriateness and attention to the field of science to develop entrepreneurship in the university and the relationship with industry. In this regard, the purpose of this study was to design an entrepreneurial curriculum model with an emphasis on the relationship between industry and academia in the sports science . Method: The research approach was qualitative and used a grounded theory methodology and in-depth interviews were used for this purpose. Participants included students and professors of sports sciences at public universities, who were considered as 23 according to the purposeful sampling . Results: The results showed that the university structure, communication with industrial institutions and centers, training of university manpower are effective in developing the entrepreneurial curriculum model and the development of learning in the real world. As a result, to strengthen the curriculum, the need to pay attention to cooperation between institutions and gain experience through internships and contracts between universities and the participation of other disciplines as well as industrial centers can strengthen knowledge, skills, and attitudes . Conclusions: It seems that the increasing practicality of educational programs and their close relationship with the sports industry and related organizations can affect sports entrepreneurship in society .
۱۷۶۶.

Heat Stress Responses to Exercise: related mechanisms and biomarkers

کلیدواژه‌ها: Thermoregulation cutaneous vasodilation aerobic capacity genetic adaptation environmental factors homeostasis

حوزه‌های تخصصی:
تعداد بازدید : ۲۶ تعداد دانلود : ۲۶
The pathophysiology of heat stress occurs when the body's environmental and physiological responses exceed its ability to maintain homeostasis. When internal heat signals or external factors raise body temperature beyond a certain limit that the cooling mechanisms can effectively manage, the resulting increase in core temperature triggers response pathways that themselves induce physiological stress. The primary response mechanisms to heat stress include sweating, peripheral vasodilation, and shivering as thermogenic responses—all of which are activated by elevated temperatures and may seem counterproductive to the body's requirements, yet they operate through a neuromuscular and hormonal feedback system. Genetic factors influence individual heat tolerance; for instance, certain populations have variations in heat shock proteins (HSP70) and ion channels (TRPV1, RYR1) that enhance their heat response and tolerance. Additionally, individuals with higher relative VO2 max levels demonstrate greater heat tolerance, as those who are physically trained exhibit more sudomotor activity and effective evaporative cooling compared to untrained individuals. Furthermore, individuals who acclimatize to heat over time develop improved thresholds for heat stress, enabling them to better regulate internal and cardiovascular temperature stresses during exposure. This knowledge is crucial for populations at risk and in situations where physical exertion is required in hot conditions.
۱۷۶۷.

Innovative Approaches in Understanding the Stress Hyporesponsive Period: The Role of Exercise Physiologists in Unraveling its Unknown Mechanisms

نویسنده:

کلیدواژه‌ها: Stress Hyporesponsive period Physical activity Hypothalamic-pituitary-adrenal axis exercise

حوزه‌های تخصصی:
تعداد بازدید : ۲۶ تعداد دانلود : ۱۷
Stress is a fundamental response of the body to various environmental pressures, impacting physical and mental health across age groups. After birth, infants enter a phase known as the Stress Hyporesponsive Period (SHRP), during which their physiological responses to stressors are significantly diminished. This stage is crucial as it shapes how individuals respond to stress later. Research indicates that the type and severity of stress experienced during the SHRP can have long-lasting implications, affecting stress reactivity in adulthood. Consequently, there is growing interest in utilizing exercise and physical activity as tools to mitigate the effects of stress. Various sports strategies and exercise regimens are adopted by health professionals to manage both physiological and psychological stressors. Notably, exercise has emerged as an important therapeutic option for various medical conditions, contributing to improvements in individuals’ mental well-being and physical fitness. Moreover, the objectives of this research extend beyond mere treatment; they also involve the enhancement of individuals' physiological traits. This study examines the scientific literature over the past decade regarding the Stress Hyporesponsive Period and analyzes research articles. By focusing on the relationship between exercise and stress response, this research aims to fill existing gaps and explore new pathways for understanding the interactions between physical activity and stress responses.
۱۷۶۸.

Exercise Reversing Aging Process and Inducing Longevity by FOXO Proteins Family

کلیدواژه‌ها: FOXO Proteins Longevity exercise aging Metabolic Health

حوزه‌های تخصصی:
تعداد بازدید : ۲۷ تعداد دانلود : ۲۰
Aging is influenced by a wide range of biological processes, with increasing attention focused on physical exercise as an effective, non-pharmacological intervention to support healthy aging and extend lifespan. This review examines how exercise influences aging mechanisms by activating Forkhead Box O (FOXO) proteins—especially FOXO3, a critical regulator of oxidative stress resistance, metabolism, and cellular repair. By integrating evidence from both animal models and human studies, we explore how different types of physical activity, including endurance and resistance training, enhance FOXO signaling pathways that govern mitochondrial health, autophagy, and inflammation control. FOXO activation appears to play a central role in mitigating age-related diseases such as sarcopenia, cardiovascular disease, neurodegeneration, and cancer. While preclinical studies consistently demonstrate these protective effects, human data are more variable, highlighting the influence of age, sex, and intervention type. Understanding the molecular connection between exercise and FOXO activity can help develop targeted exercise recommendations to promote longevity and delay age-associated functional decline.
۱۷۶۹.

Dental caries and Intense training : A mine review

نویسنده:

کلیدواژه‌ها: Intense training Dental Caries Athletes oral cavity

حوزه‌های تخصصی:
تعداد بازدید : ۲۵ تعداد دانلود : ۱۶
Purpose: The purpose of this review study is to investigate dental caries and intense training. the oral health of athletes in various sports is inappropriate, so that athletes follow a downward trend with an increase in the incidence of various diseases of the oral cavity, performance during training and racing. Method: intense training has been identified as a harmful factor in the occurrence of a variety of oral diseases, including dental caries. Results: In this context, intense training plays a role as a negative factor in the development of dental caries in athletes by affecting various factors such as saliva PH and blood co2 in dental caries. Conclusion: In this regard, athletes need to be monitored by dentists, which seems to be effective in preventing the decline of athletes ' performance.  
۱۷۷۰.

Effect of resistance training with and without blood flow restriction on serum follistatin and leptin levels in active obese girls

کلیدواژه‌ها: resistance training follistatin Leptin blood flow restriction

حوزه‌های تخصصی:
تعداد بازدید : ۲۴ تعداد دانلود : ۱۵
Objective: Plasma follistatin and leptin proteins are important indicators in energy and metabolism regulation that also affect body weight. The aim of this study was to investigate the effect of resistance training with and without blood flow restriction on serum follistatin and leptin levels in inactive obese girls. Materials and Methods: Thirty inactive obese girls with an age range of 20 to 28 years participated in this study. The subjects were randomly divided into 3 groups: resistance training with blood flow restriction and resistance training without blood flow restriction, and a control group (10 subjects in each group). Data analysis was performed using paired t-tests and one-way ANOVA at a significance level of less than 5%. Results: After 12 weeks of participation in sports activity, follistatin levels in both resistance training groups with and without blood flow restriction increased significantly after training (p<0.05). On the other hand, leptin levels decreased significantly in these groups after training interventions (p<0.05). Regarding the main effect of groups, the results showed that there was a significant difference between the types of resistance training and the control group in follistatin (P=0.036) and leptin (P=0.015) levels. Conclusion: The findings indicate that resistance training can lead to an increase in plasma follistatin levels and a decrease in leptin in inactive obese girls. It is recommended that obese individuals use such resistance training with blood flow restriction as a non-invasive, low-cost, and side-effect-free method to promote health and lose weight
۱۷۷۱.

A Comparison of the Effects of Three Training Methods (Plyometric, Weighted, and Barbell Training) on the Aerobic Capacity of Male Volleyball Players

کلیدواژه‌ها: Plyometric weighted barbell anaerobic power

حوزه‌های تخصصی:
تعداد بازدید : ۲۴ تعداد دانلود : ۱۸
Purpose: The aim of this research is to compare the effects of three training methods — plyometric, weighted, and barbell (Turkish) training — on the anaerobic capacity of high school male volleyball players. A total of 48 subjects, aged 23 ± 5 years, were selected purposefully and randomly divided into four groups of 12 participants each. Method: The height and weight of the participants were recorded, and their anaerobic capacity was measured using the Lewis formula based on the vertical jump test during the pre-test. The three experimental groups performed weight training, plyometric exercises, and plyometric exercises combined with weights, respectively. The fourth group followed a standard volleyball training regimen. The training period lasted eight weeks, with three training sessions per week. After the eight weeks, a post-test was conducted to measure the effects of the different training methods on the participants' anaerobic capacity. Results: The results of this study showed: Eight weeks of weight training significantly improved the anaerobic capacity of the volleyball players eight weeks of plyometric training significantly improved the anaerobic capacity of the volleyball players. Eight weeks of barbell (Turkish) training significantly improved the anaerobic capacity of the volleyball players.There was no significant difference between the effects of the three training methods on anaerobic capacity. Conclusion: Based on the results of this research, it can be concluded that weight training, plyometric training, and barbell training are all effective in increasing the anaerobic capacity of volleyball players. Given the available time, number of athletes, and resources, any of these training methods can be selected to improve the anaerobic power of athletes. Coaches may choose the most appropriate method depending on the specific needs of their athletes and the resources available.
۱۷۷۲.

The Role of Genetic and Metabolomic Profiling in Response to High-Intensity Interval Training (HIIT) Among Individuals with Moderate Fitness Levels

کلیدواژه‌ها: Mitochondrial Biogenesis Personalized Exercise aerobic capacity Genetic Polymorphism Metabolic Adaptation

حوزه‌های تخصصی:
تعداد بازدید : ۲۳ تعداد دانلود : ۲۲
Purpose: This study aimed to investigate the influence of genetic polymorphisms and metabolomic profiles on physiological adaptations to a 6-week High-Intensity Interval Training (HIIT) program in individuals with moderate fitness levels, addressing the variability in exercise response. Method: Thirty moderately fit adults participated in a supervised 6-week HIIT intervention. Pre- and post-training assessments included VO2max, lactate threshold, genetic profiling of key polymorphisms (e.g., PPARGC1A rs8192678) using PCR and next-generation sequencing, and untargeted metabolomic analysis via liquid chromatography-mass spectrometry (LC-MS). Statistical analyses involved paired t-tests, multivariate regression, principal component analysis (PCA), and partial least squares discriminant analysis (PLS-DA). Results: Significant improvements were observed in VO2max (p < 0.001) and lactate threshold (p = 0.004). Carriers of the PPARGC1A G allele showed greater aerobic capacity gains, accompanied by upregulation of PGC-1α expression. Metabolomic profiling revealed significant shifts in glucose and lipid metabolism pathways post-HIIT. Multivariate models identified interactions between genetic variants and metabolomic changes that predicted individual training responsiveness. Conclusion: Integrating genetic and metabolomic data enhances understanding of individual variability in HIIT adaptations and supports the development of personalized exercise prescriptions to optimize health and performance outcomes.
۱۷۷۳.

تغییرات استقامت قلبی تنفسی و نشانگرهای اکسیداتیو متعاقب مکمل یاری کوآنزیم Q10 در ترکیب با تمرین تناوبی با شدت بالا در سالمندان: یک کارآزمایی بالینی تصادفی دوسوکور(مقاله علمی وزارت علوم)

کلیدواژه‌ها: تمرینات تناوبی با شدت بالا کوآنزیم Q10 سالمندی VO2peak استرس اکسیداتیو

حوزه‌های تخصصی:
تعداد بازدید : ۲۲ تعداد دانلود : ۲۹
هدف: با افزایش سن، کاهش عملکرد سیستم آنتی اکسیدانی و افزایش استرس اکسیداتیو منجر به افزایش خطر آسیب های سلولی و تسریع فرایند سالمندی می شود. کوآنزیم Q10 (CoQ10) به عنوان یک آنتی اکسیدان ممکن است با تقویت دفاع سلولی، سازگاری های ناشی از تمرینات شدید را بهبود بخشد؛ بر این اساس، پژوهش حاضر با هدف بررسی اثر مکمل یاری CoQ10 بر سازگاری دستگاه آنتی اکسیدانی ناشی از تمرینات تناوبی با شدت بالا (HIIT) در سالمندان انجام شد. مواد و روش ها: در این مطالعه، ۳۸ سالمند (۲۲ مرد و ۱۶ زن، ۶۵ تا ۷۵ سال) به صورت داوطلبانه شرکت کردند و به طور تصادفی به دو گروه تمرین+مکمل CoQ10 و تمرین+پلاسبو تقسیم شدند. شاخص VO2peak و نشانگرهای استرس اکسیداتیو شامل مالون دی آلدئید (MDA)، سوپراکسید دیسموتاز (SOD)، گلوتاتیون پراکسیداز (GPX) و ظرفیت آنتی اکسیدانی کل (TAC)، پیش و پس از هشت هفته تمرین HIIT و مصرف روزانه ۱۰۰ میلی گرم مکمل یا دارونما اندازه گیری شدند. یافته ها: نتایج نشان داد، گروه تمرین+مکمل بهبود معناداری را در (0.05>P) VO2peak و شاخص های آنتی اکسیدانی [MDA (0.05>P)، SOD (0.05>P) و TAC (0.05>P)] در مقایسه با گروه پلاسبو نشان داد. نتیجه گیری: براساس یافته ها، اثر هم افزای مکمل یاریCoQ10 با تمرینات HIIT موجب بهبود بیشتر ظرفیت قلبی تنفسی و سازگاری آنتی اکسیدانی در سالمندان می شود.
۱۷۷۴.

Study of Physical Education Educators’ Capabilities in Providing Active Teaching Methods Due to COVID-19

کلیدواژه‌ها: Educators’ Competency Active Teaching Capabilities COVID-19

حوزه‌های تخصصی:
تعداد بازدید : ۲۲ تعداد دانلود : ۲۲
Background : This study was descriptive, analytic applications that aim to determine of Study of Physical education teachers’ capabilities in Mazandaran University of educators in providing active teaching methods were performed. Method: Two types of questionnaire to collect data from students and educators, teacher training centers in Mazandaran University were analyzed. Semi-structured interviews were carried out by highly qualified teachers. Moreover, the study also documents, the unit responsible for libraries, educational technology and teacher training institutions in the field of laboratory facilities and the services units were interviewed. In this study, 56 teachers and 207 students were examined . Results: The results of testing hypotheses show that the amount of teaching experience and qualification of teachers and facilities, Educational Technology Center and the amount of library facilities and teacher training institutions selected by the instructors teaching methods and valid relationship is not statistically significant (α>0.05) and the way teachers teach and students to conduct research activities and research interest rate relationship is valid and meaningful. Teaching between teacher and student learning outcomes are valid and statistically significant relationship exists (α≤0.05) . Conclusions: Based on instructional objectives and course content and learning conditions to select an appropriate method for teaching and to deepen students' educational media makes maximum use of the facilities.
۱۷۷۵.

Investigating the Effect of Emotional Persuasion on Intention, Motivation and Change in Attitudes toward Entrepreneurship of Sports Students

کلیدواژه‌ها: Emotional persuasion Entrepreneurial Intention entrepreneurial motivation Entrepreneurial attitude Sports Entrepreneurship

حوزه‌های تخصصی:
تعداد بازدید : ۲۳
Purpose: The aim of this study was to investigate the effect of emotional motivation on intention, motivation and change in attitudes toward entrepreneurship of sports science students. Method: The study method of this research was quasi-experimental with three groups of subjects (two experimental and control groups) and pre-test and post-test design. The research population consists of graduate and bachelor's degree students in sports sciences of Mashhad universities, in which 150 people were randomly selected as a sample and were exposed to persuasive messages for one month. Results: Findings show that positive emotional motivation, intention, motivation and change of attitude towards entrepreneurship of sports science students have a positive and significant effect. Also, negative emotional motivation had no effect on students' entrepreneurial motivation and attitude, but in relation to the variable of entrepreneurial intention, it shows a significant effect. Conclusion: Therefore, it can be concluded that by showing videos and playing clips along with images and messages related to entrepreneurship, students can be encouraged to take steps towards entrepreneurship .
۱۷۷۶.

Relationship between Social Factors with Promotion of Women to Management Position in Sports Organizations

کلیدواژه‌ها: Social factors promotion Women Sports organizations

حوزه‌های تخصصی:
تعداد بازدید : ۲۱ تعداد دانلود : ۲۲
Background: The aim of this study has been to investigate the relationship between social factors and the promotion of women to management position in sport organizations in Iran . Method: Regarding the objective, this study is practical and regarding the method of implementation, it is descriptive, the population of this research in 2021, includes all the staff of the Youth and Sports Office of West Azerbaijan of Iran up to 216 people. Using Morgan’s tables 136 subjects were selected through stratified random sampling as the sample. In order to collect data, the questionnaires of social factors of the promotion of women to management positions were used, the validity of which was confirmed by experts and its reliability was obtained to be 0.86 through Cronbach's alpha test . Results: The results indicate that there is a positive significant relationship between gender and gender discrimination and women’s promotion to the position of management in sport organizations. In addition, there is also a positive significant relationship between the elimination of conflict between work and family and also family support and women’s promotion to manage mint positions in sports organizations . Conclusions: However, it appears that women are still faced with gender equity issues in sports governance, athletic media representation, and perception in sports. Therefore, the field of sport management should continue to work towards a level of quality that truly treats women as equals, offers them equal opportunity, and permits them to feel equal in sport management and athletic participation .
۱۷۷۷.

The cumulative effects of the myofascial release technique by increasing the number of sessions: The effect of 6 weeks of myofascial stretching training on flexibility of posterior chain muscles in Multiple Sclerosis

کلیدواژه‌ها: Myofascial release flexibility Multiple Sclerosis Posterior Muscles Chain Stretching Training

حوزه‌های تخصصی:
تعداد بازدید : ۲۰ تعداد دانلود : ۲۱
Purpose: Multiple Sclerosis (MS) is a chronic neurological condition leading to muscle stiffness, spasticity, and reduced flexibility, particularly in the posterior chain muscles. Myofascial release (MFR), has shown promise in improving flexibility in various populations, but the cumulative effects of increasing the number of sessions have not been well-studied in individuals with MS. This study aimed to investigate the effects of a six-week myofascial stretching training program on the flexibility of posterior chain muscles in individuals with MS, with a focus on evaluating the cumulative effects of increasing the number of sessions. Method: A total of 30 female participants with MS were randomly assigned to one of two groups: a group receiving myofascial stretching training twice per week (n=15), and a group receiving training four times per week (n=15). Flexibility of the posterior chain muscles was assessed using the Sit and Reach (S&R) test at baseline, after 6 weeks of the intervention. Results: The results showed a significant improvement in S&R scores in both intervention groups. The group receiving training four times per week demonstrated greater flexibility improvements than the group receiving training twice per week, suggesting a cumulative effect of increasing the number of sessions. Conclusion: A six-week myofascial stretching training program can effectively improve the flexibility of posterior chain muscles in individuals with MS. Increasing the frequency of sessions from twice per week to four times per week leads to greater cumulative improvements in flexibility. These findings have important implications for the design of rehabilitation programs targeting flexibility in individuals with MS.
۱۷۷۸.

Impact of COVID-19 Crisis on University Faculty Members' Physical Activity Levels

کلیدواژه‌ها: Corona-virus Pandemic Physical activity Physical Health exercise

حوزه‌های تخصصی:
تعداد بازدید : ۲۰ تعداد دانلود : ۲۲
Purpose: The aim of this study was to investigate the Impact of COVID-19 Crisis on University Faculty Members' of Allameh Tabatabai University Physical Activity Levels. Methods: Data were collected using a researcher-made 21-item questionnaire that 284 people were considered as a sample and answered the online questionnaire. Results: The results of this study show that the faculty members of the university do not have intense and moderate activities. But the general knowledge about the benefits of exercising during the coronavirus period has increased. Other results of this study showed that university faculty members tend to participate in sports activities in post-corona conditions. Conclusion: In a general conclusion, The Covid-19 crisis has created inactivity among human societies. Technology is expanding rapidly and people's lifestyles are changing. Therefore, it is necessary to develop programs for physical activity and health of people.
۱۷۷۹.

تأثیر تمرین به شیوه فعالیت های ورزشی میان وعده ای شدید بر آمادگی قلبی-تنفسی: یک مرور نظام مند(مقاله علمی وزارت علوم)

کلیدواژه‌ها: فعالیت های وزشی میان وعده ای اسنک های فعالیت ورزشی فعالیت ورزشی کوتاه و پراکنده حداکثر اکسیژن مصرفی ظرفیت هوازی

حوزه‌های تخصصی:
تعداد بازدید : ۲۱ تعداد دانلود : ۴۱
هدف: کمبود وقت و دسترسی محدود به امکانات ورزشی، از موانع رایج پیروی از دستورالعمل های توصیه شده درباره فعالیت بدنی منظم، به ویژه در بزرگسالان شاغل است. در سال های اخیر، «اسنک های فعالیت ورزشی» به عنوان رویکردی عملی و کوتاه مدت برای ارتقای سلامت عمومی مدنظر قرار گرفته اند. در مطالعه حاضر، این شیوه شامل انجام وهله های بسیار کوتاه (کمتر از یک دقیقه) و شدید فعالیت بدنی به صورت پراکنده در طول روز تعریف شد. با وجود رشد فزاینده مطالعات در این زمینه، هنوز شواهد نظام مند و یکپارچه ای درباره اثر آن ها بر آمادگی قلبی-تنفسی وجود ندارد؛ ازاین رو، این مطالعه با هدف پر کردن این خلأ و مرور نظام مند شواهد موجود طراحی شد. مواد و روش ها: این مرور نظام مند براساس دستورالعمل PRISMA 2020 و با ثبت پروتکل در سامانه PROSPERO (کد ثبت: CRD420251081118) انجام شد. جستجو در پایگاه های بین المللی پابمد، اسکاپوس، Web of Science، گوگل اسکولار و پایگاه های داخلی مگیران و جهاد دانشگاهی، بدون محدودیت زمانی تا ژوئن ۲۰۲۵ انجام شد. از 1070 مقاله شناسایی شده، ۹ مطالعه با مجموع ۲۳۲ شرکت کننده (18 تا 59 سال) واجد شرایط ورود بودند (ملاک های ورود براساس چارچوب PICOS تعریف شدند). غربالگری و ارزیابی کیفیت توسط دو پژوهشگر مستقل صورت پذیرفت. یافته ها: اجرای پروتکل های اسنک فعالیت ورزشی (سه تا شش وهله فعالیت شدید ۲۰ تا ۳۰ ثانیه ای، سه بار در هفته به مدت شش تا هشت هفته) باعث بهبود معنا دار VO₂max/VO₂peak(در بازه 4 درصد تا 27 درصد) در جمعیت های متنوع شد. همچنین این شیوه در مقایسه با تمرینات تداومی با شدت متوسط، عملکرد بهتری در ارتقای آمادگی قلبی-تنفسی داشت. نتیجه گیری: یافته ها نشان می دهد که اجرای اسنک های فعالیت ورزشی با شدت بالا، در قالب چند وهله کوتاه و پراکنده در طول روز، رویکردی مؤثر، ساده و ادغام شدنی در زندگی روزمره برای بهبود آمادگی قلبی-تنفسی، به ویژه در افراد کم تحرک است؛ هرچند به انجام مطالعات گسترده تر و بلندمدت برای تأیید نتایج نیاز است.
۱۷۸۰.

The Impact of Premenstrual Syndrome (PMS) on Athletic Performance in Female Combat Athletes

کلیدواژه‌ها: Premenstrual syndrome PMS martial arts female athletes Athletic Performance Hormonal Fluctuations

حوزه‌های تخصصی:
تعداد بازدید : ۲۱ تعداد دانلود : ۲۷
Purpose: This study aimed to investigate the effect of PMS on aerobic, anaerobic, and cognitive performance in female combat athletes. Method: In this semi-experimental study with a repeated measures design, 20 female combat athletes (mean age: 24.5±2.1 years) were assessed during two phases of their menstrual cycle: the PMS phase (7-10 days before menstruation) and the non-PMS phase (days 7-14 of the cycle). Aerobic performance was measured using the Bruce treadmill test, anaerobic performance was assessed by the Wingate test, and cognitive performance was evaluated through simple and choice reaction time tests. Statistical analyses were performed using paired t-tests and Pearson correlation (p<0.05). Results: The findings showed a significant reduction in VO₂ max (6.2%), time to exhaustion, and a significant increase in maximal heart rate and Rate of Perceived Exertion (RPE) during the PMS phase compared to the non-PMS phase (p<0.05). Anaerobic performance also declined, with a reduction in peak power (6.2%) and mean power (7.5%), an increase in fatigue index (16.2%), and lower blood lactate levels (p<0.01). Cognitive performance deteriorated during PMS, demonstrated by increased simple (16.7%) and choice (16.6%) reaction times, more errors, and decreased accuracy (p<0.01). Furthermore, there was a significant positive correlation between PMS symptom severity and VO₂ max reduction (r=0.72), as well as between blood lactate levels and reaction time (r=0.65) (p<0.01). Conclusion: PMS negatively affects aerobic, anaerobic, and cognitive performance in female combat athletes. These findings highlight the importance of considering the menstrual cycle phases in designing training and competition schedules for female athletes to optimize performance and prevent potential declines associated with PMS.

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