تاثیر 12 هفته تمرین استقامتی و مکمل ال آرژنین بر سطوح دی متیل آرژنین نامتقارن (ADMA) و نیتریک اکساید در زنان یائسه دارای پرفشار خونی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه تربیت بدنی و علوم ورزشی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید بهشتی، تهران، ایران

چکیده

مقدمه و هدف: تمرین ورزشی و مداخلات تغذیه ای از قبیل مصرف ال آرژنین نقش موثری در کنترل پرفشار خونی دارند. بنابراین، در پژوهش حاضر تاثیر 12 هفته تمرین استقامتی و مکمل ال آرژنین بر سطوح دی متیل آرژنین نامتقارن (ADMA) و نیتریک اکساید (NO) در زنان مبتلا به پرفشار خونی مورد بررسی قرار گرفته است.
مواد و روش ها: 40 زن یائسه دارای پرفشار خونی (56/2±26/55 سال، شاخص توده بدن: 18/1±61/28 kg.m2) به صورت تصادفی در چهار گروه (10 نفری) شامل گروه های دارونما، ال آرژنین، تمرین و تمرین+ال آرژنین تقسیم شدند. برنامه تمرین استقامتی به مدت 12 هفته با 75-60 درصد ضربان قلب بیشینه اجرا شد. مصرف ال آرژنین نیز روزانه 6 گرم در نظر گرفته شد. خونگیری در دو مرحله پیش آزمون و پس آزمون (48 ساعت بعد از جلسه آخر تمرین یا مصرف ال آرژنین) انجام و سطوح ADMA و NO به روش الایزا اندازه گیری شد. تجزیه و تحلیل داده ها با نرم افزار SPSS24 و آزمون آنالیز کوواریانس انجام گردید.
نتایج: سطح ADMA در گروه تمرین و تمرین+ال آرژنین نسبت به گروه دارونما و ال آرژنین کاهش معناداری نشان داد (05/0>p). سطح NO در همه گروه ها در مقایسه با گروه دارونما به صورت معنادار افزایش یافت (05/0>p). با وجود کاهش فشار خون سیستولی در گروه  های ال آرژنین، تمرین و تمرین+ال آرژنین در مقایسه با گروه دارونما (001/0>p)، کاهش فشار خون سیستولی در گروه تمرین+ال آرژنین نسبت به گروه تمرین (001/0>p) و ال آرژنین (05/0>p) نیز معنادار بود.
نتیجه‌گیری: مصرف ال آرژنین اثرگذاری تمرین استقامتی در کاهش فشار خون سیستولی را افزایش می دهد که احتمالاً تاحدودی بواسطه افزایش بیشتر سطح NO اتفاق می افتد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of 12-weeks endurance training and L-arginine supplement on the levels of asymmetrical dimethylarginine (ADMA) and nitric oxide in postmenopausal hypertensive women

نویسندگان [English]

  • Bita Bordbarazari 1
  • Mandana Gholami 1
  • Khosrow Ebrahim 2
  • Farshad Ghazalian 1
  • Hossein Aabed Natanzi 1
1 Department of Physical Education and Sport Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Department of Physical Education and Sports Sciences, Shahid Beheshti University, Tehran, Iran
چکیده [English]

Background and Objective: Exercise training and nutritional interventions such as L-arginine ingestion have an effective role in controlling hypertension. Therefore, the aim of present study was to investigate the effect of 12-weeks endurance training and L-arginine supplement on the levels of asymmetrical dimethylarginine (ADMA) and nitric oxide (NO) in hypertensive women.
Materials and Methods: 40 postmenopausal hypertensive women (55.26±2.56 years old, body mass index: 28.61±1.18 kg.m2) were randomly assigned in four groups (10 person) including: placebo, L-arginine, training and training+L-arginine groups. Endurance training program conducted for 12 weeks with 60-75 percent of maximum heart rate. L-arginine consumption considered 6 g daily. Blood sampling performed in pre and posttest (48 hours after last training session or L-arginine consumption) and ADMA and NO were measured by ELISA method. Data were analyzed by SPSS24 software and analysis of covariance test.
Results: ADMA in training and training+L-arginine groups indicated significant decrease compared to placebo and L-arginine groups (p < 0.05). NO levels significantly increased in all groups compared to placebo group (p < 0.05). Despite decrease in systolic blood pressure in L-arginine, training and training+L-arginine groups compared to placebo group (p < 0.001), decrease in systolic blood pressure in training+L-arginine group were significant compared to training (p < 0.001) and L-arginine (p=0.007) groups.
Conclusion: L-arginine consumption increases the effectiveness of endurance training in decreasing systolic blood pressure that is partly exerted by further increase in NO levels.

کلیدواژه‌ها [English]

  • Hypertension
  • Postmenopausal
  • Endurance training
  • L-arginine
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