تاثیر یک وهله فعالیت مقاومتی بر پاسخ های هورمونی و ایمنی در محیط گرم

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دکتری فیزیولوژی ورزش، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه تهران، تهران، ایران.

2 دانشیار گروه فیزیولوژی ورزش، دانشکده علوم انسانی، دانشگاه تربیت مدرس، تهران، ایران.

3 استاد گروه فیزیولوژی ورزش، دانشکده علوم انسانی، دانشگاه تربیت مدرس، تهران، ایران.

4 استادیار گروه فیزیولوژی ورزش، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید بهشتی، تهران، ایران.

چکیده

زمینه و هدف: ورزش در محیط گرم منجر به تغییر واکنش­ هورمون­های استرسی و عوامل ایمنی متفاوت از محیط معمولی می­ شود. هدف از تحقیق حاضر  بررسی تاثیر یک وهله فعالیت مقاومتی بر پاسخ ­های هورمونی و ایمنی در محیط گرم بود. روش تحقیق: تعداد 8 آزمودنی پسر با میانگین سنی 2±27 سال در فرآیند تحقیق شرکت کردند. برنامه تمرین ابتدا در محیط طبیعی (20oC) و یک هفته بعد در محیط گرم (35oC ) اجرا شد. یک ساعت پیش، بلافاصله و یک ساعت پس از فعالیت مقاومتی با شدت 70 درصد یک تکرار بیشینه که اجرای 3 نوبت با 10 تکرار را شامل می گردید؛ نمونه ­های خونی گرفته شد. در هر دو محیط، دمای بدن از ناحیه زیر بغل اندازه گیری شد. مقادیر اینترلوکین-15 (IL-15)، پروتئین شوکی گرمایی 70 (HSP70)، تستوسترون و کورتیزول سرم به روش الایزا اندازه گیری شدند. از آزمون تحلیل واریانس با اندازه های تکراری و آزمون تعقیبی بونفرونی برای استخراج نتایج استفاده شد و سطح معنی ­داری 0/05≥p منظور گردید. یافته­ ها: افزایش معنی داری در مقادیر کورتیزول (004/0p=)، تستوسترون (0/02=p)،HSP70  (p=0/001) و IL-15 (p=0/03) پس از فعالیت مقاومتی در محیط گرم نسبت به محیط معمولی؛ بدست آمد. نتیجه گیری: با این فرض این که محیط گرم با افزایش کورتیزول موجب سرکوبی IL-15 می­ گردد و کاهش این سایتوکاین، احتمالا هایپرتروفی عضلانی را محدود می­کند؛ می توان گفت فعالیت مقاومتی حاد در محیط گرم اثرات مثبت فعالیت به منظور هایپرتروفی را کاهش می­ دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of a bout of resistance exercise in warm weather on Immune and hormonal responses

نویسندگان [English]

  • Arezoo Eskandari Shahrabi 1
  • Hamid Agha Alinejad 2
  • Reza Gharakhanlo 3
  • Mohammad Fashi 4
1 PhD of Exercise Physiology, Faculty of Physical Education and Sport Science, University of Tehran, Tehran, Iran.
2 Associate Professor, Departmen of Exercise Physiology, Faculty of Humanities, Tarbiyat Modares University, Tehran, Iran.
3 Full Professor, Departmen of Exercise Physiology, Faculty of Humanities, Tarbiyat Modares University, Tehran, Iran.
4 Assistant Professor, Departmen of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Shahid Beheshti University, Tehran, Iran.
چکیده [English]

Background and Aim: Exercise in warm weather can lead to a change in stress hormones and immune factors as compare to normal conditions. The present study aimed to investigate the effects of a bout of resistance exercise in a warm weather on Immune and hormonal responses. Materials and Methods: Eight male students with an average of 27±2 years participated in this study. The exercise program was performed for two conditions, at the first week it done in a normal temperature (20° C) and then it performed in a warm temperature (35°C) in the following week. Blood samples were taken one hour before, immediately after and one hour after of about a resistance exercise including 10 repetition, 3 sets up to 70 percent of 1 repetition moximum. In both environments, body temperature was measured from the axillary area. The serum concentration of Interleukin-15 (IL-15), heat shock protein 70 (HSP70), testosterone and cortisol were measured by ELISA method. The ANOVA test for repeated measures and Bonferoni tests were applied for reslts extraction. Results:  Resistance training in warm wether significantly increased the cortisol (p=0.04), HSP70 (p= 0.007), IL-15 (p=0.03), and testosterone (p=0.02) values. Conclusion: Assuming that cortisol elevation due to warm condition induce IL-15 suppression and IL-15 dropping limit muscle hypertrophy; it can be suggested that a bout of resistance exercise in a warm weather colud attenuate exercise –induced hypertrophy .

کلیدواژه‌ها [English]

  • Warm weather
  • resistance training
  • Interleukin-15
  • Heat shock protein 70
  • cortisol
  • Testosterone
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