مقدمه و هدف: چاقی به عنوان یک عامل خطر برای بسیاری از بیماری ها از جمله بیماری های سوخت و سازی و قلبی-عروقی شناخته می شود. از آنجایی که تأثیر تمرینات ورزشی روی میکرو RNAهای (miRNA) مرتبط با چاقی بویژه mir-27a به ندرت بررسی شده است؛ لذا، تحقیق حاضر با هدف بررسی تأثیر هشت تمرینات تناوبی با شدت بالا (HIIT) بر سطوح mir-27a و غلظت پروتئین واکنشگر C (CRP) در مردان چاق انجام شد. مواد و روش ها: 24 داوطلب مرد میانسال چاق (30 BMI>و دامنه سنی 40-50 سال) بصورت تصادفی به دو گروه تمرین و کنترل تقسیم شدند. گروه تمرینی هشت هفته تمرینات HIIT را بصورت دایرهای (زانو بلند، پروانه، بورپی، کتل بل اسنچ و اسکات گابلت)، با شدت 80-90% ضربان قلب کاروونن اجرا کردند (چهار هفته اول: سه جلسه و چهار هفته دوم: چهار جلسه در هفته). نمونههای خونی 48 ساعت قبل و 48 ساعت بعد از آخرین جلسه تمرینی به منظور تحلیل شاخصهای mir-27a و CRP از آزمودنیها دریافت شد. سپس، داده ها با استفاده از آزمونهای تی مستقل و تی همبسته تجزیه و تحلیل شد. نتایج: هشت هفته تمرین HIIT در مقایسه با گروه کنترل باعث کاهش معنیدار سطوح mir-27a وCRP شد (05/0>P). نتیجهگیری: به نظر میرسد تمرینات ورزشی به ویژه تمرینات HIIT می تواند سبب کاهش mir-27 و CRP شده و احتمالاً با جلوگیری از التهاب ناشی از چاقی، از بروز بیماری های متابولیسمی جلوگیری نماید.
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