نوع مقاله : مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I
نویسندگان
1 استاد یار، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم انسانی، واحد اردبیل، دانشگاه آزاد اسلامی، اردبیل، ایران.
2 دانشیار گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران
3 استادیار گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران.
چکیده
هدف مطالعة حاضر مقایسة پاسخ های اندوتلیالی و عصبی سمپاتیکی شریان بازویی به محرک های اتساع و انقباض عروقی
23 سال) و هشت آزمودنی /5±2/ در وزنه برداران نخبه و گروه کنترل همسن ک متحرک است. هفت وزنه بردار نخبه (سن 2
24 سال) داوطلبانه در این پژوهش شرکت کردند. برای تعیین اندازه های شریان بازویی /3±2/ سالم کم تحرک (سن 12
در حالت استراحت، پس از 5 دقیقه انسداد بازو (اتساع عروقی وابسته به جریان) و طی تحریک سمپاتیکی حاد (تست
فشار سرما) از اولتراسوگرافی داپلر وضوح بالا استفاده شد. پاسخ های واکنش عروقی به ترتیب از اوج تغییرات اتساعی و
مستقل و انداز هگیری مکرر در سطح t انقباضی اندازة مجرای شریانی محاسبه شد و با استفاده از آزمون های آماری
تجزیه وتحلیل شد. اندازة مجرای شریان بازویی وزنه برداران ب هترتیب در هر سه حالت پایه [میانگین P≤ 0/ معن اداری 05
و اوج انقباض [میانگین [(P=0/ 0 میلی متر ( 002 / اوج اتساع [میانگین تفاو تها 57 ،[(P=0/ 0 میل یمتر ( 001 / تفاوت ها 5
به طور معن اداری نسبت به گروه کنترل بزر گتر بود. هرچند تفاوت معن اداری بین [(P=0/ 0 میلی متر ( 003 / تفاوت ها 498
شاخص های اتساع عروقی وابسته جریان، انقباض شریانی وابسته به تون سمپاتیکی و دامنة عملیات فیزیولوژیک شریان
نتایج مطالعة حاضر نشان داد که واکنش عملکردی .(P≤ 0/ بازویی وزنه برداران و گروه کنترل همسن مشاهده نشد ( 05
شریان بازویی لزوماً در وزنه برداران نخبه افزایش نمی یابد. هرچند، وزنه برداران نخبه از اندازة مجرای شریان بازویی
بزرگ تری در مقایسه با گروه کنترل همسن سالم برخوردارند.
کلیدواژه‌ها
عنوان مقاله [English]
A Comparison of Sympathetic Neural and Endothelial Vasoreactivity of Brachial Artery in Elite Weightlifters with a Sedentary Age-Matched Control Group
نویسندگان [English]
- Mahdi Khorshidi-Hosseini 1
- Lotfali Boboli 2
- Salim Vahedi 3
1 Assistant Professor, Department of physical education and sport sciences, Faculty of Humanities, Ardabil Branch, Islamic Azad University, Ardabil, Iran.
2 Associated Professor, Department of physical education and sport sciences, Faculty of education sciences and psychology, University of Mohaghegh Ardabili, Ardabil, Iran
3 Assistant Professor, Department of physical education and sport sciences, Faculty of education sciences and psychology, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]
The aim of the present study was to compare the sympathetic neural and
endothelial responses of brachial artery to vasodilatory and constrictor
stimuli in elite weightlifters and a sedentary age-matched control group. 7
elite weightlifters (age 23.5±2.2 yrs) and 8 sedentary healthy subjects (age
24.3±2.12 yrs) voluntarily participated in this study. High-resolution
Doppler ultrasound was used to determine brachial artery diameters at rest,
following 5 minutes of forearm occlusion [Flow Mediated Dilation (FMD)]
and during acute sympathetic stimulation [cold pressure test (CPT)].
Vasoreactivity responses were calculated from the vasodilatory and
constrictor peak changes in artery diameter. The acquired data were analyzed
using independent t test and repeated measures method at P≤0.05. Brachial
artery diameters in baseline [mean differences, 0.5 mm (P=0.001)], peak
vasodilation [mean differences, 0.57 mm (P=0.002)] and peak constriction
[mean differences, 0.498 mm (P=0.003)] were significantly greater in
weightlifters than control group. However, no significant difference was
observed in %FMD, %CPT and vascular operating range (VOR) between
weightlifters and age-matched control group (P≤0.05). The present study
indicated that the function of brachial artery is not necessarily enhanced in
elite weightlifters. However, elite weightlifters had larger brachial artery
diameter than age-matched healthy control subjects.
کلیدواژه‌ها [English]
- brachial artery
- elite weightlifters
- endothelial function
- vasoreactivity
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