تأثیر یک دوره‌ی تمرینات تداومی متوسط و تناوبی شدید بر مقادیر گیرنده‌ی نوع 2 اکتیوین میوکارد و سطوح پلاسمایی میوستاتین موش‌های صحرایی نر

نوع مقاله : مقاله های پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم ورزشی و تربیت بدنی، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران

2 استادیار، مرکز تحقیقات طب ورزش، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف‌آباد، ایران

چکیده

مقدمه: فعالیت ورزشی با تغییر در غلظت عوامل رشدی و گیرنده‌های آن ممکن است اثرات مفیدی برای عضله‌ی قلبی داشته باشد. از این‌رو، هدف از این تحقیق بررسی تأثیر یک دوره‌ی تمرینات تداومی متوسط و تناوبی شدید بر مقادیر گیرنده‌ی نوع 2 اکتیوین میوکارد و سطوح پلاسمایی میوستاتین موش‌های صحرایی نر بود.روش‌ها: تعداد 30 سر موش صحرایی نر با محدوده‌ی سنی سه ماه، بعد از گذراندن دوره‌ی آشناسازی، به صورت تصادفی به سه گروه مساوی شاهد، تمرین تداومی متوسط و تمرین تناوبی شدید تقسیم شدند. تمرین تداومی با شدت 60-50 درصد بیشینه‌ی توان موش در مدت زمان 80 دقیقه در طول هشت هفته و هر هفته پنج جلسه و همچنین، تمرینات تناوبی شدید با شدت 90-85 درصد بیشینه‌ی توان موش و شیب 20 درجه به طول انجامید. گیرنده‌ی نوع 2 اکتیوین میوکارد بافت بطن چپ به روش Immunohistochemistry (IHC) و میوستاتین به روش Enzyme-linked immunosorbent assay (ELISA) اندازه‌گیری شد. داده‌‌های به دست آمده، با استفاده از آزمون One-way ANOVA و آزمون تعقیبی Tukey در سطح معنی‌‌داری 050/0 > P تجزیه و تحلیل شدند.یافته‌ها: با مقایسه‌ی بین گروهی، اختلاف معنی‌داری را در متغیر میوستاتین، میان گروه‌‌های تمرینی با گروه شاهد دیده شد (001/0 = P)، اما میان گروه‌های تمرینات تداومی متوسط و تناوبی شدید، تفاوتی مشاهده نشد (300/0 = P). همچنین، در گیرنده‌ی نوع 2 اکتیوین میوکارد اختلاف معنی‌داری بین گروه‌‌های مورد مطالعه مشاهده نشد (050/0 = P).نتیجه‌گیری: احتمال می‌رود تمرینات تداومی متوسط و تناوبی شدید، اثرات مطلوبی بر کاهش میوستاتین داشته باشد، اما تفاوت معنی‌داری بین نوع تمرینات وجود ندارد.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of a Period of Moderate Endurance Training and High Interval Training on Activin Receptor Type II in Heart, and Plasma Levels of Myostatin in Male Rats

نویسندگان [English]

  • Maijd Beigi 1
  • Jamshid Banaei 2
  • Saeed Keshavarz 2
  • Hamid Zahedi 2
1 PhD Student, Department of Physical Education and Sport Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2 Assistant Professor, Sport Medicine Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran
چکیده [English]

Background: Exercise trainings have beneficial effects on myocardium by changing the concentration of growth factors and their receptors. The aim of this study was to determine the effect of a period of moderate endurance training and high interval training on activin receptor type II in heart, and plasma levels of myostatin in male rats.Methods: After the familiarization period, 30 male rats with three months of age limitation were randomly divided to equal three groups of control, moderate endurance training, and high interval training. Moderate endurance training was continued for 8 weeks, each week 5 sessions, and every session, 80 minutes with intensity of 50-60 percent, as well as high interval training with intensity of 85-90 percent of rats’ power with a ramp of 20 degrees. Activin receptor type II in the myocardial left ventricle was measured using immunohistochemistry (IHC) method, and myostatin was measured by enzyme-linked immunosorbent assay (ELISA) method. The data were analyzed using one-way ANOVA and Tukey's post-hoc tests at the significance level of P < 0.050.Findings: In between groups comparison, there was a significant difference between the training and control groups in myostatin level (P = 0.001), but there was no significant difference between moderate endurance training and high interval training (P = 0.050). There was also no significant difference between the groups in myocardium activin receptor type II (P = 0.050).Conclusion: It cautiously seems that moderate endurance training with high interval training have desirable effects on reducing myostatin, with no significant difference between the types of trainings.

کلیدواژه‌ها [English]

  • Endurance training
  • High-Intensity Interval Training
  • Activin receptor type II
  • Myostatin
  • Male
  • Rats
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