نشریه علوم زیستی ورزشی

تأثیر دو شیوۀ تمرین مقاومتی و بی‌تمرینی بر سطوح سرمی میوستاتین، کورتیزول، تستوسترون و قدرت عضلات مردان غیرورزشکار

نوع مقاله : مقاله پژوهشی

نویسندگان

مختار عسکرپور کبیر 1
محمد رضا کردی 2
فاطمه شب خیز 3

1 کارشناس‌ارشد گروه فیزیولوژی ورزشی دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه تهران

2 دانشیار گروه فیزیولوژی ورزشی دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه تهران

3 استادیار گروه فیزیولوژی ورزشی دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه تهران

https://doi.org/10.22059/jsb.2015.55232
چکیده
هدف از تحقیق حاضر، بررسی تأثیر دو شیوۀ تمرین مقاومتی و یک دوره بی‌تمرینی بر سطوح سرمی میوستاتین، کورتیزول، تستوسترون و قدرت عضلات مردان غیرورزشکار بود. به این منظور 34 مرد غیرورزشکار (سن 8/2±35/33 سال) به سه گروه: تجربی الف (چهار جلسه تمرین )، تجربی ب (سه جلسه تمرین در هفته) و کنترل تقسیم شدند. تمرین مقاومتی ( 24 جلسه) براساس پروتکل تمرینی کرامر و همکاران (2004) و شامل 3 ست 8 تا 10 تکراری با 60 تا 70 درصد 1RM در عضلات بزرگ بدن بود. نمونه‌گیری خون، آزمون قدرت و سنجش ترکیب بدنی پیش از شروع اولین جلسه، پایان 24 جلسه و بعد از یک دوره بی‌تمرینی انجام گرفت. نتایج با استفاده از تجزیه‌وتحلیل Mix ANOVA و آزمون تعقیبی توکی نشان داد که تمرین مقاومتی موجب افزایش قدرت عضلانی، تودۀ بدون چربی، تستوسترون و کاهش کورتیزول و میوستاتین در هر دو گروه شده است. این افزایش و کاهش در گروه تجربی الف بیشتر از گروه تجربی ب بود (05/0 (P< ، همچنین یک دوره بی‌تمرینی موجب افزایش سطوح سرمی میوستاتین و کورتیزول در گروه تجربی ب شد (05/0 (P 

کلیدواژه‌ها

بی‌تمرینی
تستوسترون
تمرین مقامتی
کورتیزول
میوستاتین

عنوان مقاله English

The Effects of Two Kinds of Resistance Training and Detraining on Serum Levels of Myostatin, Cortisol, Testosterone and Muscle Strength of Non-Athlete Men

نویسندگان English

Mokhtar Askarpour Kabir 1
Mohamad Kordi 2
Fatme Shabkhiz 3
1 M.Sc. of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
2 Associate Professor, Exercise Physiology Department, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
3 Assistant Professor, Exercise Physiology Department, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
چکیده English

The aim of this study was to determine the effect of two kinds of resistance training and one period of detraining on serum levels of myostatin, cortisol, testosterone and muscle strength of non-athlete men. For this purpose, 34 non-athlete men (age 33.35+2.8 yr) were divided into three groups: experimental A (4 sessions of training per week), experimental B (3 sessions of training per week) and control. The resistance training (24 sessions) was performed based on Cramer et al. (2004) including 3 sets of 8-10 repetitions with 60-70% 1RM in big muscles. Blood sampling, strength test and body composition measurement were performed before the first session, after the last session and after one period of detraining. The data were analyzed by Mix ANOVA and Tukey post hoc test. The results showed that resistance training increased muscle strength, fat free body mass and testosterone while it decreased cortisol and myostatin in both groups. This increase and decrease were higher in experimental A group than experimental B group (P˂0.05). Also, a period of detraining increased serum levels of myostatin and cortisol in experimental B group (P˂0.05). Finally, the findings showed that training frequency led to higher increase and maintenance of those changes resulted from resistance training.

کلیدواژه‌ها English

Cortisol
detraining
Myostatin
resistance training
Testosterone

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نشریه علوم زیستی ورزشی
دوره 7، شماره 2 - شماره پیاپی 2
تابستان 1394
صفحه 311-328

  • تاریخ دریافت 01 آذر 1392
  • تاریخ بازنگری 28 دی 1392
  • تاریخ پذیرش 02 بهمن 1392

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