تاثیر تمرینات تناوبی شدید بر سطوح سرمی TNFα کودکان چاق

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار گروه فیزیولوژی ورزش دانشگاه تربیت دبیر شهید رجایی، تهران، ایران

2 دانشجوی دکتری فیزیولوژی ورزش دانشگاه تربیت دبیر شهید رجایی، تهران، ایران

چکیده

مقدمه و اهداف
شیوع چاقی و در پی آن بیماری­های قلبی-عروقی در بین کودکان در حال افزایش است و مشخص شده که تمرینات ورزشی اثرات مفید خود را در کاهش وزن و بهبود سلامت قلبی عروقی دارد، خصوصا تمرین  HITکه بر روی کودکان بسیار محدود بوده است. بر این اساس هدف از پژوهش حاضر بررسی اثر 8 هفته تمرینات شدید تناوبی (HIT) بر سطوح سرمی TNFα در کودکان چاق می­باشد.
مواد و روش­ها
در پژوهش حاضر، 34 کودک چاق که به­طور تصادفی به دو گروه تجربی با میانگین سنی 35/0±58/9 و شاخص توده بدنی (BMI) 95/0±89/30 و گروه کنترل با میانگین سنی 48/0±51/9 و شاخص توده بدنی (BMI) 81/0±89/29 به مدت 8 هفته و 3 جلسه تمرین در هفته، تمرینات HIT را که شامل مرحله­های 30 ثانیه­ای دویدن با حداکثر سرعت و 5/1دقیقه استراحت فعال بود را اجرا کردند. تعداد مرحله­ها از 6 مرحله در هفته اول به 10 مرحله در هفته آخر افزایش یافت. نمونه­های خونی 48 ساعت قبل و بعد از اجرای پروتکل جمع­آوری شد. سطوح سرمی TNFα به روش الایزا اندازه­گیری و کمی شد. جهت آنالیز آماری از نرم­افزار SPSS 20 و در بخش آمار استنباطی از آزمون تحلیل واریانس در اندازه­های مکرر و همچنین برای حذف اثر پیش­آزمون از کووریت استفاده شد.
یافته­ ها
داده­ها نشان دادند کاهش معناداری در گروه تجربی نسبت به گروه کنترل در سطوح TNFα و همین طور BMI قبل و پس از یک دوره تمرین HIT وجود دارد.
نتیجه­ گیری
تمرینات HIT موجب کاهش BMI و توده بدنی می­شود. می­توان گفت تمرینات HIT از طریق کاهش توده چربی موجب کاهش سطوح سرمی TNFα در کودکان می­گردد و احتمالا این کاهش می­تواند در پیشگیری، کنترل و کاهش بروز بیماری­های قلبی-عروقی موثر واقع شود. لذا انجام تمرینات HIT با رعایت احتیاط­های لازم در کودکان چاق می­تواند اثرات مثبتی داشته باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of High Intensity Training on Serum TNFα in Obese Children

نویسندگان [English]

  • Alireza Ramezani 1
  • Mina Akbari 2
1 Associate Professor, Department of Exercise Physiology, Faculty of Sport and Exercise Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran
2 PhD student, Department of Exercise Physiology, Shahid Rajaee Teacher Training University, Tehran, Iran
چکیده [English]

Background and Aim: The prevalence of children’s obesity, and thus cardiovascular diseases, is rapidly increasing and it is known that exercises have beneficial effects on losing weight and accordingly decreases of cardiovascular system. The aim of the present study was to assess the effects of eight weeks of High Intensity Training (HIT) on TNFα in obese children.
Materials and method: A total of 34 obese children were randomly divided into two groups of experimental, with the mean age of 9.58±0.35 and Body Mass Index (BMI) 30.89±0.95 and control, with the mean age of 9.51±0.48 and BMI 29.89±0.81. For 8 weeks, 3 sessions a week, participants performed HIT, including bouts of 30s with maximal speed and 1.5 min active rest between them. The number of bouts increased from 6 in the first week to 10 in the latter week. Blood samples were obtained 48 hours before and after performing the protocol and serum was separated and then levels of serum TNFα were measured and quantified using ELISA. SPSS, version 20, was used to analyse the data.
Results: Data analysis revealed a significant decrease in serum TNFα and BMI before and after doing HIT.
Conclusion: High intensity training results in the reduction of BMI and body weight. Due to the strong relationship between BMI and selected TNFα, HIT, via reduced fat mass, causes decrease of serum TNFα in children, and this reduction can effectively prevent, control, and reduce the number of cardiovascular diseases. So, doing HIT cautiously can bring about benefits in obese children. 

کلیدواژه‌ها [English]

  • High Intensity Training
  • TNFα
  • Adipocy
  • Body Mass Index
  • Cardiovascular diseases
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