نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشکده تربیت بدنی، واحد کرمانشاه، دانشگاه آزاد اسلامی، کرمانشاه، ایران

2 دانشکده تربیت بدنی، واحد کنگاور، دانشگاه آزاد اسلامی، کنگاور، ایران

چکیده

هدف: اختلال اندوتلیالی، سریعترین نشانه­ی بروز اختلال عروقی در افراد چاق و آغاز توسعه­ی پیش-پرفشارخونی است و همراه با شاخص­های لیپیدی می­تواند به بیماری­های قلبی-عروقی خطرناک منجر شود. هدف از این مطالعه تعیین اثرات تمرین مقاومتی دایره­ای بر برخی نشانگرهای اندوتلیالی، فشارخون و نیمرخ لیپیدی در زنان چاق مبتلا به پیش - پرفشارخونی بود.
روش­ها: به این منظور 24 زن چاق مبتلا به پیش-پرفشارخونی (با میانگین سن 43/4±73/44سال، شاخص توده‌ی بدن 8/3±39/32 کیلوگرم بر متر مربع ، سطح فشارخون سیستولی 61/0±21/13 و دیاستولی 33/0±65/8 میلی­متر جیوه)، به طور تصادفی در دو گروه کنترل و تمرین مقاومتی دایره­ای قرار گرفتند. گروه تمرین به مدت هشت هفته، هر هفته 3 جلسه و هر جلسه 50 تا 60 دقیقه تمرین مقاومتی دایره­ای شامل 3 دایره و 9 ایستگاه متشکل از چهار حرکت بالاتنه (پرس سینه، کشش پایینی، قایقی به صورت نشسته، جلوبازو) و سه حرکت پایین تنه (پرس پا، جلوران دستگاه، پشت ران دستگاه) و دو حرکت میان تنه (کرانچ شکم و باز شدن کمر) را با 15-12 تکرار اجرا کردند که شدت تمرین بر اساس توصیه­های انجمن قلب آمریکا برای حرکات بالاتنه 40 درصد 1RM و برای حرکات پایین تنه 60 درصد 1RM بود. گروه کنترل طی مداخله هیچ­گونه فعالیت تمرینی نداشتند. فشارخون، اندازه­های آنتروپومتریکی و نمونه­های خونی 48 ساعت قبل از اجرای مداخله و 48 ساعت پس از آخرین جلسه­ تمرین اندازه­گیری شدند.
نتایج: نتایج به­دست­آمده نشان داد که هشت هفته تمرین مقاومتی دایره­ای می­تواند سبب کاهش معنادار درصد چربی بدن (005/0P=)، نسبت کمر به لگن (043/0P=)، فشار خون سیستولی (001/0P=) و دیاستولی (002/0P=) و تری­گلیسرید (043/0P=) شده و سطوح نیتریک اکساید را به طور معنادار افزایش دهد (008/0P=).
نتیجه­ گیری: به نظر می­رسد هشت هفته تمرین مقاومتی دایره­ای می­تواند با کاهش برخی سطوح لیپیدی، افزایش شبکه مویرگی در عضلات فعال و افزایش انعطاف­پذیری عروق، سبب افزایش نیتریک اکساید و در نتیجه کاهش فشارخون شود.

کلیدواژه‌ها

عنوان مقاله [English]

The effects of eight weeks circuit resistance training on some endothelial markers, blood pressure and lipid profiles in pre-hypertensive obese women

نویسندگان [English]

  • Hengameh Moradian 1
  • Sedigheh Hosseinpour Delavar 1
  • Ali Zabet 2

1 Department of physical education. Kermanshah branch, Islamic Azad University, Kermanshah, Iran

2 Department of physical education, Kangavar branch, Islamic Azad University, Kangavar, Iran

چکیده [English]

Purpose: Endothelial dysfunction is the fastest symptom of vascular dysfunction in obese individuals also the onset of pre-hypertension development and along with lipid profiles can lead to dangerous cardiovascular diseases. The aim of this study was to investigate the effects of eight weeks circuit resistance training (CRT) on some endothelial markers, blood pressure and lipid profiles in pre-hypertensive obese women.
Methods: For this purpose, 24 pre-hypertensive obese women (age 44.73 ± 4.43 years, body max index 32.39 ± 3.8kg/m2, systolic blood pressure 13.21 ± 0.61 and diastolic 8.65 ± 0.33 mmHg) were randomly assigned to CRT and Control groups. CRT group performed circuit resistance training for eight weeks, three sessions per week and each session was 50 to 60 minutes. Resistance movements performs in the form of three circles and nine stations, including four upper body movements (chest press, lateral pull down, seated cable row, biceps cable curl) and three lower body movements (leg press, seated leg extension, leg curl), and two core-body movements (crunch and back extension) with 12-15 repetitions, which according to the recommendations of the American Heart Association was 40% 1RM for upper body and 60% 1RM for lower body movements. Control group didn’t have any training activities during the intervention. Blood pressure, anthropometric measurements and blood samples were collected 48 hours before the intervention and 48 hours after the last training session.
Results: The results showed that eight weeks of circuit resistance training can significantly reduce body fat percentage (P = 0.005), waist to hip ratio (P = 0.043), systolic (P = 0.001) and diastolic (P = 0.002) blood pressure and triglycerides (P = 0.043) and significantly increase nitric oxide levels (P= 0.008).
Conclusion: It seems that eight weeks of CRT can decrease blood pressure by decline some lipid profile and also increase in nitric oxide levels by increase in capillary network in active muscles, and vascular flexibility.

کلیدواژه‌ها [English]

  • Obesity
  • pre-hypertension
  • Circuit resistance training
  • nitric oxide
  • endothelin-1
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