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

نویسندگان

1 .استادیارگروه فیزیولوژی ورزشی بخش علوم ورزشی دانشکده علوم تربیتی و روانشناسی دانشگاه شیراز، شیراز، ایران

2 استاد گروه فیزیولوژی ورزشی دانشکده تربیت بدنی دانشگاه تهران، تهران،ایران

3 . دانشیارگروه فیزیولوژی ورزشی دانشگاه تهران، تهران،ایران

4 .استاد مرکز تحقیقات فیزیولوژی ورزشی، دانشگاه علوم پزشکی بقیه الله، تهران،ایران

چکیده

هدف از پژوهش حاضر بررسی تاثیر پیش شرطی سازی با فعالیت ورزشی تناوبی خیلی شدید تناوبی بر متابولیت های NO (NO2- ,NO3-) و اندازه انفارکتوس میوکارد ناشی از آسیب ایسکمی خون رسانی مجدد در موش های سالم نر بود. از این رو 44 سر موش نژاد ویستار تصادفی در 4 گروه HIIT (8n= )، گروهHIIT + پروتکل IR (14n= )، گروه کنترل (8n= ) و گروه کنترل + پروتکل IR (14n= ) تقسیم شدند. هر جلسه HIIT شامل 1 ساعت فعالیت ورزشی در 3 مرحله گرم کردن، 6دقیقه دویدن با شدت 50 تا 60% VO2max ، بخش اصلی شامل 7 تناوب 7 دقیقه ای دویدن با شیب 5 تا 20 درجه (4 دقیقه با شدت 80 تا 120% و 3 دقیقه با شدت 50 تا 60% VO2max) و مرحله سرد کردن شامل 5 دقیقه دویدن با شدت 50 تا 60 % VO2max بود. گروه کنترل در هیچ گونه برنامه فعالیت ورزشی شرکت داده نشد. NO و متابولیت های آن با استفاده از روش گریس سنجیده شد. نتایج پژوهش نشان داد برنامه فعالیت ورزشی در مقایسه باگروه کنترل تاثیر فزاینده معنی داری بر مقادیر نیتریت(8.55 میکرومول در لیتر معادل 34.79%)، نیترات (62.02 میکرومول در لیتر معادل 149.48%) و NOX (66 میکرومول در لیتر معادل 98.11%) گروه است. هم چنین، تفاوت AAR وINF نشان می دهد هرچند AAR در گروه برنامه ورزشی در مقایسه با گروه کنترل به میزان 9.06% بیشتر بود (0.010p= )، اندازه INF گروه برنامه ورزشی به میزان 23.02% کمتر از گروه کنترل بوده است (0.001p<). این پژوهش نشان داد احتمالا یکی از مسیرهایی که از راه آن یک دوره HIIT به حفاظت عضله قلبی منجر می شود و اندازه انفارکتوس میوکارد را پس از آسیب ایسکمی/ خون رسانی مجدد کاهش می دهد می تواند به دنبال باعث تغییرات فزاینده در محور NO-NO3-, NO2- شود.

کلیدواژه‌ها

عنوان مقاله [English]

The Effects of High Intensity Interval Training Preconditioning on Metabolites of NO (NO2- ,NO3-) and Infarction Size of Myocardium after Ischemia/Reperfusion Injury in Healthy Male Rat (Study to Survey one of Cardioprotective Mechanisms of Exercise)

نویسندگان [English]

  • Ali Asghar Fallahi 1
  • Abbasali Gaeini 2
  • Mohamad Reza Kordi 3
  • ali khoshbaten 4

1 Assistant Professor of Sport Physiology, Department of Sport Sciences, Faculty of Education and Psychology, Shiraz University, Shiraz, Iran

2 Professor of Sport Physiology at Tehran University, Tehran, Iran

3 Associate Professor of Sport Physiology, University of Tehran, Tehran, Iran

4 . Professor of Sport Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.

چکیده [English]

The purpose of this study was the effects of exercise preconditioning with high intensity interval training (HIIT) on metabolites of NO (NO2- , NO3-), and infarction size of myocardium after ischemia/reperfusion injury in healthy male rat. For this reason, 44 wistar rat were randomly divided into 4 group HIIT (n=8), Group HIIT + protocol IR (n=14), control group (n=8) and control + protocol IR (n=14). Each session of HIIT was 1 hour of exercise in the 3-stage, 6-minute running of 50 to 60% VO2max warm up, 7 Period 7 minute running with a including of 5 to 20 ° slop (4 min with an intensity of 80 to 120, 3 minutes of 50 - 60% VO2max) and 5-minute running of 50 to 60% VO2max cool-down. Control group did not participate in any exercise program. NO and its metabolites were measured by using Griess reaction. Results showed there was a significant difference on nitrite (0.855 mol per liter, equivalent to 34.79%), nitrate (6.202 mol per liter, equivalent to 149.48%) and NOX (6.6 micromoles per liter, equivalent to 98.11%) levels in HIIT group than control group. That, the results showed, AAR was significantly more (9.06%, p=0.010) and INF was significantly lesser (23.2%, p <0.001) in exercise training group in comparison with control. In generally, it seems that increase in No- NO3-, NO2- axis is one of mechanisms that HIIT exercise program can protect heart from Ischemia/Reperfusion injury and decreased myocardial infarction.

کلیدواژه‌ها [English]

  • Cardioprotection
  • HIIT
  • NO2-
  • Preconditioning
  • NO3-
  • NO
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