The Effect of Exercise Program Obtained from Functional Movement Screening Test on Hip Muscle Strength and Dynamic Postural Stability to Prevent Anterior Cruciate Ligament Injury in Healthy Male Soccer Players

سابقه و هدف: فوتبال یکی از پربرخوردترین رشته‌های ورزشی است و استفاده از تمرینات پیشگیرنده در این رشته ورزشی امری ضروری است. هدف از پژوهش حاضر بررسی تأثیر برنامه تمرینی حاصل از نتایج آزمون غربالگری حرکتی عملکردی بر قدرت عضلات ران و پایداری قامتی پویا، جهت پیشگیری از آسیب رباط صلیبی قدامی در مردان فوتبالیست سالم بود. روش بررسی: مطالعه حاضر از نوع نیمه تجربی، با طرح پیش آزمون و پس آزمون بود. جامعه آماری پژوهش حاضر را مردان فوتبالیست سالم 27-18 سال و دارای سابقه بازی در تیم‌های لیگ استانی که شرایط ورود به تحقیق را دارا بودند تشکیل دادند. تعداد 30 فوتبالیست (سن: 2.98 ± 22 ، قد: 6.5 ± 185.93 و وزن: 6.27 ± 83.06) به عنوان نمونه انتخاب و به‌طور تصادفی به دو گروه مساوی تجربی و کنترل تقسیم شدند. جهت ارزیابی قدرت عضلات ران و تعادل پویا، به ترتیب از داینامومتر ایزوکنتیک کینکام و دستگاه تعادلی بایودکس استفاده شد. برنامه تمرینی به عنوان گرم کردن، به مدت هشت هفته، هر هفته سه جلسه و در هر جلسه بین 25-20  دقیقه در گروه تجربی اجرا شد. گروه کنترل به فعالیت های خود ادامه دادند. جهت رعایت ملاحظات اخلاقی، موافقت آگاهانه و رضایت داوطلبانه از تمامی آزمودنی‌ها اخذ شد. جهت تجزیه و تحلیل آماری داده ها آزمون تی تست همبسته و  آنالیز واریانس با اندازه‌های تکراری در سطح معناداری P≤0.05 استفاده شد. یافته‌ها: تفاوت معنی داری در قدرت عضلات بازکننده، چرخش دهنده خارجی و دورکننده ران در هر دو پا (P<0.05) و نیز شاخص کلی تعادل، انحراف قدامی-خلفی و شاخص انحراف میانی- جانبی (P<0.05) در بین گروه کنترل و تجربی مشاهده شد. نتیجه گیری: بر اساس نتایج به دست آمده از پژوهش حاضر، برنامه تمرینی حاصل از نتایج آزمون غربالگری حرکتی عملکردی بر قدرت عضلات ران و پایداری قامتی پویای مردان فوتبالیست سالم تاثیر معناداری دارد و احتمالا می‌تواند از بروز آسیب رباط صليبي قدامي پیشگیری نماید. How to cite this article: Barat-Shorak MA, Khoshraftar-Yazdi N, Shahtahmassebi B. The Effect of Exercise Program Obtained from Functional Movement Screening Test on Hip Muscle Strength and Dynamic Postural Stability to Prevent Anterior Cruciate Ligament Injury in Healthy Male Soccer Players. Irtiqa Imini Pishgiri Masdumiyat. 2022;10(2):87-96.Background and Objectives: Soccer is one of the most popular sports and it is necessary to use preventive exercises in this sport. Therefore, the aim of this study was to investigate the effect of the exercise programs obtained from the functional movement screening tests on hip muscle strength and dynamic postural stability to prevent anterior cruciate ligament injury in healthy male soccer players. Materials and Methods: The statistical population of the present study consisted of healthy male football players aged 18-27 years and with a history of playing in provincial league teams who were eligible to enter the study. Thirty football players (age: 22 ± 2.98, height: 185.93 ± 6.5, and weight: 83.06 ± 6.27) were selected as a sample and randomly divided into two equal experimental and control groups. Kincam isokinetic dynamometer and Biodex balance device were used to evaluate the strength of hip muscles and dynamic postural stability, respectively. An exercise program as the warm-up was performed for 20-25 minutes per session, three sessions per week, and for eight weeks, by the experimental group. The Control group continued to perform their daily program. It should be noted that informed consent and voluntary consent were obtained from all subjects. Correlated t-tests and analysis of variance with repeated measures were used for statistical analysis at the significant level of P≤0.05.   Results: Significant differences were observed in the strength of the hip extensors, external rotators, and abductors muscles in both legs (P<0.05) as well as total deviation index, anterior-posterior deviation index, and a medial-lateral deviation index (P <0.05) between experimental and control groups. Conclusion: It could be concluded that training programs obtained from functional movement screening tests effects hip muscle strength and dynamic posture stability in healthy male soccer players. Therefore, it may prevent Anterior Cruciate Ligament injuries.   How to cite this article: Barat-Shorak MA, Khoshraftar-Yazdi N, Shahtahmassebi B. The Effect of Exercise Program Obtained from Functional Movement Screening Test on Hip Muscle Strength and Dynamic Postural Stability to Prevent Anterior Cruciate Ligament Injury in Healthy Male Soccer Players. Irtiqa Imini Pishgiri Masdumiyat. 2022;10(2):87-96

Corresponding Author The effect of degradation on seismic damage of RC buildings The effect of degradation on seismic damage of RC buildings

ABSTRACT The severity of seismic damage of reinforced concrete buildings depends on the tectonic characteristics of area, seismic features of ground motion, quality and quantity of buildings. One of the most important factor's, affecting the seismic damage, is the degrading rate of building. Degradation of stiffness and strength are the parameters, which their effect on the seismic damage of buildings are investigated, using an inelastic dynamic analysis. The buildings which are studied are moment resisting RC frames. In order to study the inelastic dynamic behavior of these buildings, IDARC software is used. Based on the obtained results, 40% degradation of strength or 50% degradation of stiffness will cause severe structural damage in the buildings

The effect of degradation on seismic damage of RC buildings

The severity of seismic damage of reinforced concrete buildings depends on the tectonic characteristics of area, seismic features of ground motion, quality and quantity of buildings. One of the most important factor\u27s, affecting the seismic damage, is the degrading rate of building. Degradation of stiffness and strength are the parameters, which their effect on the seismic damage of buildings are investigated, using an inelastic dynamic analysis. The buildings which are studied are moment resisting RC frames. In order to study the inelastic dynamic behavior of these buildings, IDARC software is used. Based on the obtained results, 40% degradation of strength or 50% degradation of stiffness will cause severe structural damage in the buildings