مقایسه تاثیر یک جلسه فعالیت مقاومتی کم‌شدت همراه با محدودیت جریان خون و فعالیت مقاومتی شدید بر سطوح سرمی VEGF-A در پسران ورزشکار

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار گروه فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی دانشگاه تهران، تهران، ایران

2 کارشناس ارشد فیزیولوژی ورزش، دانشکده تربیت بدنی وعلوم ورزشی، دانشگاه تهران، تهران، ایران

3 دکتری فیزیولوژی ورزشی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

زمینه و هدف: امروزه تمرینات مقاومتی به عنوان روشی موثر برای بدست آوردن سازگارهای مختلف ناشی از  فعالیت ورزشی بکار می‌روند. در اکثر مطالعات افزایش قدرت و حجم عضلانی به دنبال این شیوه تمرینی مورد بررسی قرار گرفته است. با این حال، اخیراً سازگاری‌های قلبی عروقی نظیر آنژیوژنز، افزایش خون‌رسانی به بافت و بهبود در عملکرد هوازی متعاقب با آن نیز مورد توجه محقیق قرار گرفته است. ﻫﺪف از پژوهش ﺣﺎﺿﺮ ﻣﻘﺎﻳﺴه پاسخ VEGF به دو نوع ﺗﻤﺮﻳﻦ ﻣﻘﺎوﻣﺘﻲ ﺑﺎ و ﺑﺪون ﻣﺤﺪودﻳﺖ ﺟﺮﻳﺎن ﺧـﻮن پس از یک وهله فعالیت بود.
مواد و روش‌ها: ﺑـﻪ اﻳﻦ ﻣﻨﻈﻮر 36 پسر ژیمناستیک‌کار 10 تا 14 ساله در یک طرح تحقیق نیمه تجربی شرکت کردند. آزمودنی‌ها با میانگین (وزن 11/8±11/37 کیلوگرم، قد 58/16±11/145 سانتی‌متر، شاخص توده بدن 77/1±40/17 کیلوگرم بر مترمربع) به طور تصادفی به سه گروه کنترل (12n=)، تمرین مقاومتی سنتی (12n=)، و تمرین مقاومتی همراه با محدودیت جریان خون (12n=)، تقسیم شدند. تمرین شامل سه حرکت باز شدن زانو، خم شدن آرنج و پرس سینه بود. نمونه‌های خونی قبل و نیم ساعت بعد از اجرای تمرین گرفته شد. از آزمون آماری تی‌وابسته برای بررسی نتایج درون‌گروهی و از آنالیز واریانس یک‌راهه با تست تعقیبی LSD برای بررسی نتایج بین گروهی استفاده شد.
یافته‌ها: نتایج درون گروهی نشان داد که پس از یک وهله فعالیت ورزشی متغییر VEGF در هر دو گروه‌ تمرین مقاومتی شدت بالا (001/0=P) و گروه انسدادی افزایش معنی‌داری داشت (001/0=P). نتایج بین‌گروهی عدم تفاوت بین دو گروه مقاومتی شدت بالا و مقاومتی کم‌شدت همراه با محدودیت جریان خون را نشان داد (33/0p=).
نتیجه‌گیری: یک جلسه فعالیت مقاومتی با محدودیت جریان خون در مقایسه با فعالیت مقاومتی شدت بالا، تاثیر مشابهی در افزایش VEGF سرمی کودکان ورزشکار دارد و به همین دلیل، جهت سازگاری‌های آنژیوژنیک ناشی از عامل رشد اندوتلیال عروقی و بهبود در عملکرد هوازی به‌دنبال آن، همانند تمرینات مقاومتی شدت‌بالا مناسب‌ بنظر می‌رسد.

تازه های تحقیق

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کلیدواژه‌ها


عنوان مقاله [English]

Comparison of the Low-Intensity Resistance Exercise with Blood Flow Restriction and High Intensity Resistance Exercise on Serum Levels of VEGF-A In Adolescent Athletes

نویسندگان [English]

  • Ali Akbarnejad 1
  • Morteza Yari 2
  • Mohamad Mohamadi 2
  • Ali Rajabi 3
1 Exercise Physiology Department, Faculty of Physical Education and Sports Sciences ,Tehran University, Tehran, Iran
2 Exercise Physiology Department, Faculty of Physical Education and Sports Sciences ,Tehran University, Tehran, Iran
3 Department of Physical Education and Sport Sciences, University of Mohaghegh Ardabili, Ardabil, IRAN.
چکیده [English]

Background & Purpose: Resistance training as an effective way to get different adaptations of exercise. In the most studies is taken into consideration the increase strength and muscle mass to follow this training method. Recently, it has been considered cardiovascular adaptations such as angiogenesis, increased blood flow to tissue and improve aerobic performance after resistance training. Therefore, the aim of this study was to compare the acute responses to endothelial growth factor-A in two types of resistance training with and without the blood flow restriction.
Material and Methods: For this purpose, adolescent gymnast boys aged 10 to 14 years participated in a quasi-experimental research design. The subjects (mean weight 37.11 ± 8.11 kg, height 145.16 ± 11.58 cm, body mass index 17.40 ± 1.77 kg m) were randomly divided into three groups; control (n=12), traditional resistance training (n=12), and resistance exercise with blood flow restriction (n=12), respectively. Training protocol includes three motions included leg extension, elbow flexion and bench press. Blood samples were taken before and half an hour after training. Using T-dependent test to check the results of intergroup and One-Way ANOVA with LSD test was used for evaluating the results of between groups.
Results: The results of inter-group showed that a variable VEGF after acute exercise in traditional resistance training groups (p=0.001) and resistance exercise with blood flow restriction (p=0.001), was significant. The results showed that in both of them protocol, there was no significant difference between groups in levels of VEGF, was not significantly different (p=0.33).
Conclusion: One session Resistance exercise with blood flow restriction compared to high intensity resistance exercise, a similar effect in increasing serum VEGF children athletes and for this reason, such as high intensity resistance exercise seems appropriate to provide Angiogenic adaptation of VEGF and improvement in aerobic performance.

کلیدواژه‌ها [English]

  • Traditional Resistance Training
  • Blood Flow Restriction
  • Vascular Endothelial Growth Factor
  • Adolescent Athlete

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