نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه تربیت بدنی و علوم ورزشی، واحد علیآباد کتول، دانشگاه آزاد اسلامی، علیآباد کتول، ایران
2 گروه آموزش تربیتبدنی، دانشگاه فرهنگیان، تهران، ایران
چکیده
مقدمه: تمرین تناوبی با شدت بالا (HIIT) با تقویت اتوفاژی محافظتی برای سلامت قلب افراد مبتلا به سندرم متابولیک مفید است. هدف از مطالعه حاضر تأثیر HIIT بر محتوای پروتئینهای اتوفاژی ATM، LC3-I و LC3-II در بطن چپ رتهای مبتلا به سندرم متابولیک بود.
مواد و روشها: پژوهش حاضر تجربی-بنیادی و شامل 12 رت نر 2 ماهه از نژاد اسپراگداولی با میانگین وزنی 20±180 گرم میشد. برای ایجاد چاقی به رتها غذای پرچرب 30-60 درصد خورانده شد تا به میانگین وزن بالای 310 گرم رسیدند. برای ایجاد دیابت نوع 2، محلول نیکوتینآمید و استرپتوزوتوسین (STZ) تزریق شد. قند خون 126-260 mg/dl برای شاخص دیابت نوع 2، تریگلیسرید (TG)≥150 mg/dl و لیپوپروتئین با چگالی بالا (HDL) ≤40 mg/dl برای شاخص برای شاخص سندرم متابولیک تعیین شد. رتهای سندرم متابولیک به گروه HIIT و کنترل تقسیم شدند (هرکدام 6 رت). پروتکل HIIT، 5 روز در هفته روی تردمیل با تناوبهای با شدت بالا (85-95 درصد حداکثر سرعت) و پایین (40-50 درصد حداکثر سرعت) انجام گرفت.
یافتهها: وزن بدن گروه کنترل در هفته هشتم نسبت به هفته اول افزایش معناداری داشت (0/001=P). در گروه HIIT تفاوت معناداری نشان داده نشد (0/024=P)، اما نسبت به گروه کنترل کاهش معناداری داشت. قند خون گروه کنترل افزایش معناداری داشت (0/001=P) درحالیکه گروه HIIT تفاوت معناداری نداشت (0/17=P)، اما نسبت به گروه کنترل کاهش معناداری نشان داد (0/001=P). گروه HIIT نسبت به گروه کنترل، میزان لیپوپروتئین با چگالی بالا (HDL) (mg/dl) و تریگلیسیرید (mg/dl) را افزایش (0/001=P) و کاهش (0/001=P) معناداری دادند. همچنین گروه HIIT نسبت به گروه کنترل، در پروتئینهای اتوفاژی ATM (P=0.002)، LC3-I (P=0.001) و LC3-II (P=0.001) افزایش معناداری ایجاد کردند.
نتیجهگیری: به نظر میرسد برنامه HIIT میتواند در افراد مبتلا به سندرم متابولیک برای فعالسازی اتوفاژی جهت پیشگیری از بیماریهای قلبی توسط متخصصان توصیه شود.
تازه های تحقیق
Mitra Tajari (Google Scholar)
Habib Asgharpour (Google Scholar)
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