اثر شش هفته تمرینات هوازی بر پاسخ فاکتور شبه متئورین و شاخص مقاومت به انسولین در زنان جوان دارای اضافه‌وزن و چاق

نوع مقاله : مقاله پژوهشی Released under CC BY 4.0 license I Open Access I

نویسندگان

1 دانشجوی دکتری تخصصی فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، واحد بجنورد، دانشگاه آزاد اسلامی، بجنورد، ایران

2 دکتری تخصصی فیزیولوژی ورزشی، استادیار، گروه تربیت بدنی و علوم ورزشی، واحد بجنورد، دانشگاه آزاد اسلامی، بجنورد، ایران

10.22049/jahssp.2020.26893.1325

چکیده

هدف: فاکتور شبه متئورین (mtrnl)، میوکاین نو ظهور درگیر در روند قهوه­ای شدن بافت چربی سفید است که در بهبود حساسیت به انسولین نیز نقش دارد. هدف از تحقیق حاضر بررسی اثر شش هفته تمرین هوازی بر سطح mtrnl، انسولین، گلوکز ناشتا و شاخص مقاومت به انسولین در زنان دارای اضافه‌وزن و چاق بود. روش شناسی: 20 زن جوان داری اضافه‌وزن و چاق (میانگین سنی 8/4 2/31 سال، شاخص توده بدنی 05/3 89/29 کیلوگرم بر مترمربع) به­طورتصادفی ساده و با توجه به شاخص­های ترکیب بدنی به دو گروه تجربی و کنترل تقسیم شدند. آزمودنی­ها در گروه تجربی در شش هفته تمرینات هوازی دویدن با شدت 75-50 درصد ضربان قلب ذخیره، 55-30 دقیقه در هر جلسه و پنج جلسه در هفته شرکت نمودند. خونگیری جهت بررسی شاخص­های خونی در مرحله پیش آزمون (پس از 12 ساعت ناشتایی) و پس آزمون (48 ساعت بعد از آخرین جلسه تمرینی) انجام شد. تجزیه و تحلیل داده­ها با استفاده از آزمون تحلیل کواریانس، آزمون تی همبسته و آزمون همبستگی پیرسون در سطح معنی­داری 05/0>P انجام شد. یافته­ها: اجرای شش هفته تمرین هوازی منجر به افزایش معناداری سطوح mtrnl (018/0P=) و کاهش معنی­دار سطوح انسولین (023/0P=) و شاخص مقاومت به انسولین (017/0P=) گردید. علاوه بر این، تغییرات سطوح mtrnl (048/0P=)، انسولین (049/0P=) و شاخص مقاومت به انسولین (047/0P=) بین گروه تمرین هوازی و کنترل تفاوتی معنی‌دار داشت.  نتیجه گیری: اجرای شش هفته تمرین هوازی در زنان جوان دارای اضافه‌وزن و چاق احتمالا به­واسطه افزایش سطوح mtrnl منجربه بهبود مقاومت به انسولین می‌گردد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Six Weeks of Aerobic Training on Meteorin Like Factor Response and Insulin Resistance Index in Overweight and Obese Young Women

نویسندگان [English]

  • Nasrin Dezhkam 1
  • Najmeh Rezaeian 2
1 PhD Student of Exercise Physiology. Department of physical education, Bojnourd branch, Islamic Azad University, Bojnourd, Iran.
2 PhD of Exercise Physiology, Associate professor, Department of physical education, Bojnourd branch, Islamic Azad University, Bojnourd, Iran.
چکیده [English]

Aim:   Meteorin-like factor (mtrnl) is the Novel myokine involved in browning of white adipose tissue and improving insulin sensitivity. The purpose of this study was to investigate effect of six week of aerobic training on levels of mtrnl, insulin, fasting glucose and insulin resistance index in overweight and obese women. Methods Twenty young overweight and obese women (mean age 31.2 4.8 years, Body Mass Index 29.89 3.05 Kg/m2) were randomly divided in to two groups of experimental and control, according to anthropometric indices. Subjects in experimental groups participated in six weeks of aerobic running training at intensity of 50-70 percentage of heart rate reserve, 30-55 min per session and 5 times per week. Blood samples were taken to assess blood factors in pre-test (after 12 hours of fasting) and post-test (48 hours after the last training session). Statistical analysis was done by analysis of covariance (ANCOVA), paired t-test and Pearson correlation and P value < 0.05 was considered significant.  Results:  Six weeks of aerobic exercise training resulted in significant increases in mtrnl levels (P=0.018) and significant decreases in insulin levels (P=0.023) and insulin resistance index (P=0.017). Moreover, changes in levels of mtrnl (P=0.048) and insulin (P=0.049), and insulin resistance index (P=0.047) were significantly difference between groups of aerobic training and control. Conclusion:  Six weeks of aerobic training probably improves insulin resistance by increasing mtrnl levels in young overweight and obese women.

کلیدواژه‌ها [English]

  • Meteorin-like Hormone (mtrnl)
  • Insulin resistance
  • aerobic training
  • women
  • Obesity
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