نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناس ارشد، فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.
2 استاد، فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی،تهران، ایران
3 استادیار، فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی،تهران، ایران
چکیده
زمینه و هدف: تمرین مقاومتی با محدودیت جریان خون، پاسخ و رهاسازی هورمون های آنابولیک را تحریک و هایپرتروفی را در عضلات محدود شده افزایش می دهد؛ با این وجود، تاثیر این شیوه تمرینی بر عضلات محدود نشده مجاور، کمتر بررسی شده است. هدف پژوهش حاضر بررسی تاثیر تمرین مقاومتی با محدودیت جریان خون بر سطح مقطع آناتومیکی عضلات محدود نشده مجاور در مردان جوان فعال بود. روش تحقیق: تعداد 16 مرد جوان 25 تا 30 ساله به طور تصادفی به دو گروه (8 نفره) شامل گروه تمرین مقاومتی با شدت بالا و تمرین مقاومتی با شدت پایین همراه با محدودیت جریان خون تقسیم شدند. هر دو گروه حرکات پرس سینه و اسکوات را سه جلسه در هفته و به مدت چهار هفته اجرا کردند. گروه تمرین مقاومتی با شدت بالا، سه نوبت 10 تکراری با شدت 75% قدرت بیشینه، و گروه با محدویت جریان خون، چهار نوبت 30، 15، 15 و 15 تکراری با شدت 30% قدرت بیشینه را برای هر حرکت اجرا کردند. در گروه با محدودیت جریان خون، فشار محدودکننده در شروع تمرینات 50% فشار انسداد شریانی استراحتی افراد در نظر گرفته شد و بتدریج در خلال چهار هفته، به 80% فشار انسداد شریانی استراحتی افزایش یافت. در شروع و 72 ساعت پس از آخرین جلسه تمرین، سطح مقطع عضلات سه سر بازویی، سینه ای بزرگ، چهار سر ران و سرینی بزرگ با دستگاه MRI اندازه گیری شد. داده ها با آزمون t همبسته و تحلیل کوواریانس در سطح معنی داری p<0/05 بررسی گردید. یافته ها: پس از چهار هفته، افزایش معنی داری در سطح مقطع عضلات سه سر بازویی، چهار سر رانی، سینه ای بزرگ و سرینی بزرگ هم در گروه تمرین مقاومتی با شدت بالا (به ترتیب با 4%، 5/7%،10%، 10%) و هم گروه محدودیت جریان خون (به ترتیب با 11%، 12%، 18%، 22%) مشاهده شد. نتیجه گیری: به نظر می رسدکه اثرات آنابولیکی ناشی از تمرینات با محدودیت جریان خون به صورت موضعی محدود نمی شود و می تواند به عضلات مجاور درگیر در تمرین که مستقیما تحت تاثیر محدودیت جریان خون نیستند، انتقال یابد.
کلیدواژه‌ها
عنوان مقاله [English]
The effect of four weeks resistance training along with blood flow restriction on the cross-sectional area of non-restricted muscles in active men
نویسندگان [English]
- Reza Moqimi 1
- Hamid Rajabi 2
- Sadegh Sadegh Amani-Shalamzari 3
1 MSc in Exercise Physiology, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran.
2 Professor, Exercise Physiology, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
3 Assistant Professor, Exercise Physiology, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
چکیده [English]
Background and Aim: Resistance training with blood flow restriction stimulates the response and release of anabolic hormones and increases hypertrophy in restricted muscles, however, the effect of this training method on adjacent non-restricted muscles has not been studied well. The aim of this study was to evaluate the effect of 4 weeks of resistance training along with blood flow restriction on anatomical cross-sectional area (CSA) of adjacent non-restricted muscles in active young men. Materials and Methods: Sixteen young men aged 25-30 years old were randomly divided into two groups (n=8) high-intensity resistance training (HIRT) and low-intensity resistance training with blood flow restriction (L-BFR). Both groups performed bench press and squat exercises three sessions per week during four weeks. In HIRT group, three sets of 10 repetitions (75%1RM), and in the L-BFR, four sets of 30, 15, 15 and 15 repetitions (30%1RM) was performed during every exercise. For L-BFR group, the restriction pressure was considered as 50% resting atrial occlusion pressure (AOP) at the beginning of the exercises and this pressure gradually was increased to 80% AOP during four weeks. At the beginning and 72 hours after the last training session, the CSA of triceps brachii, pectoralis major, quadriceps and gluteus maximus were calculated by MRI. Data were analyzed by paired sample t-test and analysis of covariance (ANCOVA) test at the significance level of p<0.05. Results: Four weeks of training lead to significant increase in the cross-sectional area of triceps brachii, quadriceps, pectoralis major and gluteus maximus in the HIRT (4%, 7.5%, 10%, 10% respectively) and L-BFR (11%, 12%, 18%, 22% respectively) groups. Conclusion: It seems that the anabolic effects caused by blood flow restriction exercises are not limited locally and can be transferred to the adjacent muscles involved in the exercise that are not directly affected by the blood flow restriction.
کلیدواژه‌ها [English]
- Blood flow restriction training
- Muscle hypertrophy
- Muscles cross-sectional area
- non-restricted muscles
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